Ito ang pasiya para sa duet.

Ito means this.

In this sentence, it points to something near the speaker or something the speaker is presenting right now:

Ito ang pasiya para sa duet.
= This is the decision for the duet.

So ito is a demonstrative pronoun.

Ang marks the noun phrase being identified or focused on.

In Ito ang pasiya, the speaker is saying that this is specifically the decision.

So the pattern is:

Ito ang + noun
= This is the + noun

Examples:

• Ito ang bahay. = This is the house.
• Ito ang sagot. = This is the answer.
• Ito ang pasiya. = This is the decision.

Ito ang pasiya... is the normal, natural way to say This is the decision...

Filipino often uses this pattern:

Ito ang ...
Iyan ang ...
Iyon ang ...

These mean:

• Ito ang ... = This is ...
• Iyan ang ... = That is ... (near the listener)
• Iyon ang ... = That is ... (far from both)

You can rearrange the sentence in some contexts, but Ito ang pasiya... is the standard and most natural form here.

Pasiya means decision.

It is correct Filipino, though in everyday speech many speakers also use:

• pasya
• desisyon (a common loanword from Spanish)

So these are all possible depending on style:

• Ito ang pasiya para sa duet.
• Ito ang pasya para sa duet.
• Ito ang desisyon para sa duet.

Pasiya may sound a bit more formal or careful than pasya.

Para sa means for.

So:

para sa duet
= for the duet

This phrase shows what the decision is intended for or related to.

Other examples:

• regalo para sa bata = gift for the child
• plano para sa proyekto = plan for the project
• awit para sa kasal = song for the wedding

In Filipino, para sa is the normal expression for for someone/something.

So you usually need sa after para when a noun follows:

• para sa duet = for the duet
• para sa akin = for me
• para sa guro = for the teacher

Saying para duet would sound incomplete or ungrammatical in standard Filipino.

Yes, it can be used in Filipino. It is a borrowed word, and borrowed words are very common in Filipino.

Duet means the same thing as in English: a performance by two singers, musicians, or performers.

So para sa duet simply means for the duet.

Depending on context, some speakers might also use other phrasing, but duet itself is perfectly understandable.

Because ay is not required here.

A very common Filipino pattern is simply:

Ito ang pasiya.

That already means This is the decision.

You may learn sentences like:

• Ang pasiya ay ito. = The decision is this.

That version uses ay, but it has a different structure and emphasis. In your sentence, Ito ang pasiya... is already complete and natural without ay.

A very literal breakdown is:

• Ito = this
• ang pasiya = the decision
• para sa duet = for the duet

So word-for-word, it is roughly:

This, the decision for the duet.

But natural English is:

This is the decision for the duet.

Filipino often leaves out a separate word for is in sentences like this.

Yes, if the situation changes.

These three are about distance:

• ito = this (near the speaker)
• iyan = that (near the listener)
• iyon = that (far from both)

So:

• Ito ang pasiya para sa duet. = This is the decision for the duet.
• Iyan ang pasiya para sa duet. = That is the decision for the duet.
• Iyon ang pasiya para sa duet. = That is the decision for the duet.

The grammar stays the same; only the distance or pointing sense changes.