Cabe à síndica apresentar a prestação de contas.

In this sentence, caber does not mean physical fitting. It has another common meaning in formal Portuguese: to be someone’s responsibility, to fall to someone, or to be up to someone.

So the pattern is:

caber a alguém + infinitive

= it is up to someone to do something
= it is someone’s responsibility to do something

So:

Cabe à síndica apresentar a prestação de contas.

means that presenting the accounts/report is the building manager’s responsibility.

Because two things come together here:

• the verb caber in this meaning normally takes the preposition a
• síndica is a feminine noun with the article a

So you get:

a + a síndica = à síndica

This is called crase.

A useful comparison:

• Cabe ao síndico = It is up to the male building manager
• Cabe à síndica = It is up to the female building manager

The accent in à is a grave accent, and here it marks the contraction of:

a + a = à

It is not there to show pronunciation stress in the same way some other accents do. It tells you that the preposition a and the feminine article a have merged.

So in this sentence, à síndica shows:

• a required by cabe
• a article before síndica

Because a síndica is not the grammatical subject here.

In this structure, the responsibility is assigned to someone, and the action itself is expressed by the infinitive phrase:

apresentar a prestação de contas

That infinitive phrase works as the subject-like element of the sentence, and Portuguese commonly uses cabe in the 3rd person singular in this kind of structure.

So:

• à síndica = to the manager / assigned to the manager
• apresentar a prestação de contas = the action that is her responsibility

Compare:

• Cabe à síndica apresentar a prestação de contas.
• Cabe ao diretor tomar a decisão.

This is a very normal pattern.

Because after caber a alguém, Portuguese usually uses an infinitive to say what that person is responsible for doing.

Pattern:

Cabe a alguém + infinitive

Examples:

• Cabe ao aluno estudar.
• Cabe ao juiz decidir.
• Cabe à síndica apresentar a prestação de contas.

So apresentar stays in the infinitive because it names the action, rather than forming a full second clause.

In Brazil, síndica is the feminine form of síndico. In everyday use, it usually refers to the person who manages a condominium or apartment building on behalf of the residents or owners.

A natural English equivalent depends on context, but it may be something like:

• building manager
• condominium manager
• HOA/condo association head
• trustee or administrator in some formal contexts

So this is a very Brazil-specific word tied to apartment/condo administration.

Prestação de contas is a fixed expression. It usually means something like:

• accounting report
• financial reporting
• rendering of accounts
• statement of how money was managed
• sometimes more broadly, accountability report

In a condo/building context, it usually refers to the report the manager gives about money collected and spent.

So this is not just the literal idea of presenting accounts word by word; it is a standard administrative expression.

The article a makes the phrase refer to a specific, expected report or accounting statement.

So:

• apresentar a prestação de contas = present the accounting/report
• apresentar prestação de contas = less natural here, and it sounds more generic or incomplete in most contexts

In administrative Portuguese, using the article here is very normal because it usually refers to a known obligation.

Yes. This sounds fairly formal and administrative.

You might see this kind of wording in:

• condo regulations
• meeting minutes
• legal or official notices
• bylaws
• internal rules

A more everyday version might be:

• A síndica tem que apresentar a prestação de contas.
• É responsabilidade da síndica apresentar a prestação de contas.

These are less formal and more direct.

Yes, to some extent.

These two mean basically the same thing:

• Cabe à síndica apresentar a prestação de contas.
• À síndica cabe apresentar a prestação de contas.

The second sounds even more formal or emphatic.

But be careful: changing the order too much can change the meaning. For example:

• Cabe apresentar a prestação de contas à síndica.

This can sound like it is appropriate to present the accounts to the manager, where à síndica is now interpreted as the person receiving the report, not the person responsible for presenting it.

So word order matters because it affects how à síndica is understood.

Yes, but the nuance changes a little.

• Cabe à síndica apresentar a prestação de contas.
  Formal, institutional, assigns responsibility.

• É dever da síndica apresentar a prestação de contas.
  Also formal, but more explicitly states duty.

• A síndica deve apresentar a prestação de contas.
  More direct: the manager must/should present it.

• A síndica tem que apresentar a prestação de contas.
  More conversational.

So cabe à síndica is a very natural choice when the tone is official or procedural.