Та, хто читає щовечора, краще розуміє нові слова.

No. Here Та is not the conjunction та meaning and.

In this sentence, Та is a demonstrative pronoun meaning something like that one or she who. It is the feminine singular form.

So:

• та = and / sometimes but
• Та in this sentence = that one (female)

The comma and the following хто help show that this is the pronoun, not the conjunction.

Because хто читає щовечора is a clause inserted after Та.

The structure is:

• Та = the person being referred to
• хто читає щовечора = a describing clause, literally who reads every evening

So the commas mark off that descriptive part:

• Та, хто читає щовечора, ...
• The one who reads every evening, ...

This is a very common pattern in Ukrainian with той / та / те, хто...

Here хто means who in the sense of the one who.

It introduces a clause describing Та:

• Та, хто читає щовечора = the one who reads every evening / she who reads every evening

So хто is not asking a question here. It is being used as a relative word, linking the person to the action.

Because the clause is built around хто, which is treated grammatically as singular here.

• хто читає = who reads

Also, the subject referred to by Та is one person, so singular makes sense.

In the present tense, читає does not show gender. It simply means he/she/it reads.

Yes. Та is feminine, so it refers to a female person.

Related forms are:

• той = masculine
• та = feminine
• те = neuter

So you could also have:

• Той, хто читає щовечора, ... = the one who reads every evening... / often used for a male person, or sometimes generically
• Та, хто читає щовечора, ... = specifically female

If the meaning shown to the learner is about a woman or girl, then Та is exactly right.

Because the pattern той / та / те, хто... is a standard Ukrainian structure meaning the one who...

So:

• та, хто читає... = the one (female) who reads...

If you used яка, you would normally expect an explicit noun before it:

• жінка, яка читає щовечора... = the woman who reads every evening...
• людина, яка читає щовечора... = the person who reads every evening...

So хто is natural here because there is no noun like woman or person stated directly.

Щовечора means every evening.

It is an adverbial expression built from:

• що- = every/each in this kind of formation
• вечора = related to evening

You can think of it as a fixed word meaning each evening.

A very similar alternative is:

• кожного вечора = every evening

So:

• читає щовечора
• reads every evening

Because краще means better, and here it functions as an adverb modifying the verb розуміє.

So:

• розуміє = understands
• краще розуміє = understands better

This is like English better understands, though in natural English we often say understands ... better.

Also note:

• добре = well
• краще = better

So краще is the comparative form.

It is accusative plural, because it is the direct object of розуміє.

The verb розуміти takes an object:

• розуміє що? = understands what?
• нові слова = new words

Why does it look the same as nominative? Because for inanimate plural nouns, the accusative plural is usually the same as the nominative plural.

So:

• nominative: нові слова
• accusative: нові слова

Same form, different function.

Та is in the nominative singular feminine.

It is the subject of the main sentence:

• Та ... розуміє
• That one / she ... understands

So it is the person doing the action in the main clause.

Yes, Ukrainian word order is fairly flexible.

For example, these are possible:

• Та, хто читає щовечора, краще розуміє нові слова.
• Та, хто щовечора читає, краще розуміє нові слова.

Both are natural. The original sentence puts щовечора after читає, but moving it before the verb is also possible for emphasis or rhythm.

The original version is straightforward and neutral.

It can do either, depending on context, but most naturally it sounds like a general statement about a particular type of person:

• A girl/woman who reads every evening understands new words better.

Because of Та, it still points to one female person, but it can be used in a generalizing way, similar to the one who...

If you wanted a more broadly generic statement about people in general, Ukrainian might also use something like:

• Ті, хто читають щовечора, краще розуміють нові слова.
• Those who read every evening understand new words better.

Yes, that is a very close literal translation.

A few possible English renderings are:

• She who reads every evening understands new words better.
• The one who reads every evening understands new words better.
• A girl/woman who reads every evening understands new words better.

The best English version depends on context, but grammatically the Ukrainian structure is very close to the one who... or she who...