Mi hija lleva una coleta alta para ir al colegio.

Yes, llevar can mean to carry / to take, but in this sentence it means to wear or to have on.

In Spanish, llevar is very commonly used for:

• clothes: Lleva una camiseta azul = She’s wearing a blue T-shirt.
• accessories: Lleva gafas = She wears / is wearing glasses.
• hairstyles or makeup: Lleva una coleta = She has her hair in a ponytail.

So here, lleva una coleta alta means she wears / has a high ponytail.

Una is the indefinite article, so it introduces the hairstyle as a ponytail, not the ponytail.

That is natural when you are simply describing how someone is wearing their hair:

• Lleva una coleta alta
• Lleva una trenza
• Lleva un moño

You might use la if the ponytail had already been mentioned or was already known from the context.

In Spain, coleta is the normal everyday word for a ponytail.

A learner may also come across cola de caballo, which is also understood, but coleta is especially common in Spain.

So for Spain-focused Spanish, coleta is a very useful word to learn.

Yes. Here alta means high, describing the position of the ponytail on the head.

So:

• coleta alta = high ponytail
• coleta baja = low ponytail

Also, alta matches coleta because coleta is:

• feminine
• singular

So the adjective must also be:

• feminine
• singular

That is why it is alta, not alto.

In Spanish, adjectives usually come after the noun.

So:

• una coleta alta
• un coche rojo
• una casa grande

That is the normal word order. English often puts the adjective before the noun, but Spanish usually puts it after.

Para + infinitive is a very common way to express purpose in Spanish.

So:

• para ir al colegio = to go to school
• para estudiar = to study
• para dormir mejor = to sleep better

It works especially well when the subject is the same or understood from context.

If Spanish needs a different subject, it often uses para que + subjunctive instead:

• Le preparo la mochila para que vaya al colegio
  = I prepare her school bag so that she can go to school.

But in your sentence, para ir al colegio is the natural structure.

Because a + el contracts to al.

So:

• a + el = al
• de + el = del

Examples:

• Voy al colegio
• Sube al coche
• Viene del trabajo

This contraction is required, except when el is part of a proper name, such as El Escorial.

In Spain, colegio is a very common word for school, especially for a child’s school.

A few useful points:

• colegio is very common in everyday speech
• escuela also means school, but can sound broader or be used in other contexts too
• for older students in Spain, instituto is often used for secondary school

So in a sentence about a daughter going to school, al colegio sounds very natural in Spain.

Yes, absolutely. That is also a very natural sentence.

Compare:

• Mi hija lleva una coleta alta
• Mi hija lleva el pelo en una coleta alta

The second version is a bit more explicit because it mentions el pelo.
The first version is shorter and very natural because Spanish often leaves that obvious idea unstated.

Both can be possible, but llevar is more idiomatic when talking about how someone is wearing their hair.

• Lleva una coleta alta = She is wearing / has her hair in a high ponytail.
• Tiene una coleta alta = She has a high ponytail.

Tiene is understandable, but lleva sounds more natural when describing a chosen style, just as Spanish says:

• lleva gafas
• lleva sombrero
• lleva el pelo corto

So llevar emphasizes the way something is worn or styled.

Lleva is the present indicative, third person singular, from llevar.

Depending on context, the Spanish present can mean:

• a habitual action: she wears
• a current description: she is wearing

So Mi hija lleva una coleta alta could mean either:

• she generally wears her hair that way, or
• right now she has her hair that way

Spanish often leaves that distinction to context.

In modern Spanish, possessives like mi, tu, su, nuestro normally go directly before the noun, without an article.

So:

• mi hija
• mi casa
• mi hermano

Not:

• la mi hija
• la mi casa

There are some older, literary, or regional uses with articles, but for normal modern Spanish, mi hija is the correct form.

It can, but it usually has a different tone.

• mi hija = neutral, normal way to say my daughter
• hija mía = more emotional, emphatic, or vocative

For example:

• Mi hija lleva una coleta alta = neutral statement
• ¡Hija mía! = My daughter! / Dear child! / Goodness me! depending on context

So in this sentence, mi hija is the natural choice.