Para el desayuno, mi hija quiere yogur con arándanos y moras.

Para el desayuno means for breakfast. Here, para shows the intended meal or occasion.

It is a very natural way to introduce context:

• Para el desayuno, ... = For breakfast, ...
• Para la cena, ... = For dinner, ...

If you put this phrase first, you are setting the scene before giving the main information.

Spanish often uses the definite article with meals:

• el desayuno
• la comida
• la cena

So Spanish commonly says para el desayuno, even though English usually just says for breakfast without the.

This is one of those places where Spanish and English structure things differently.

Not strictly. The comma marks a pause after the introductory phrase Para el desayuno.

So both of these are possible:

• Para el desayuno, mi hija quiere yogur con arándanos y moras.
• Para el desayuno mi hija quiere yogur con arándanos y moras.

With the comma, the sentence feels a little more clearly divided into:

1. the context
2. the main statement

Yes. That is also correct.

The difference is mainly emphasis:

• Para el desayuno, mi hija quiere... puts breakfast first and sets the context.
• Mi hija quiere... para el desayuno gives the information in a more neutral order.

Both are natural.

In modern Spanish, possessive words like mi, tu, su, nuestro normally come directly before the noun, without an article:

• mi hija = my daughter
• mi hijo = my son

So la mi hija is not standard modern Spanish in ordinary use.

Also, mi does not change for masculine or feminine singular:

• mi hijo
• mi hija

Quiere is the third-person singular present tense of querer.

So:

• yo quiero = I want
• tú quieres = you want
• él/ella quiere = he/she wants

Here the subject is mi hija, so the verb is quiere.

Because querer can be followed directly by a noun.

So:

• quiere yogur = she wants yogurt

You only need an infinitive like comer if you want to say wants to eat:

• Mi hija quiere comer yogur.

The original sentence is shorter and more natural if the point is simply what she wants for breakfast.

Spanish often leaves out the article with food when talking about an unspecified amount or a general serving:

• quiere yogur
• come pan
• bebe agua

So quiere yogur means she wants yogurt, not necessarily one yogurt as a counted item.

If you want to stress one individual yogurt, you can say:

• quiere un yogur

That sounds more like she wants a yogurt / one yogurt.

Because they are being mentioned as ingredients or toppings in a general way:

• yogur con arándanos y moras = yogurt with blueberries and blackberries

Spanish often omits articles in this kind of list.

You would use an article if you meant specific berries:

• con los arándanos que compramos ayer

That means with the blueberries we bought yesterday.

Because one preposition can introduce a whole list:

• con arándanos y moras

This works just like English with blueberries and blackberries.

Repeating con would usually be unnecessary:

• con arándanos y con moras

That is possible, but it sounds more emphatic or contrastive.

In Spain:

• arándanos usually means blueberries
• arándanos rojos usually means cranberries
• moras usually means blackberries in everyday food contexts

So this sentence sounds like yogurt with two kinds of berries.

Yogur is the standard adapted Spanish spelling and is very common in Spain.

You may also see yogurt on packaging or in brands, but yogur is perfectly normal and standard Spanish.

So for a learner, yogur is a very useful form to know.

A rough guide:

• yogur ≈ yo-GOOR
• arándanos ≈ ah-RAN-da-nos

A few details:

• In arándanos, the accent mark shows the stress: a-RÁN-da-nos
• The r in Spanish is not the same as an English r
• The y in yogur sounds like the y in yes, though the exact sound can vary by region

A rough pronunciation of the full sentence would be:

PA-ra el de-say-YOO-no, mi EE-ha KYE-re yo-GOOR kon ah-RAN-da-nos ee MO-ras

That is only an approximation, but it can help you get started.