La artista expone la idea.

In Spanish, nouns often need an article when you are talking about a specific person or thing. Here, la artista means the artist.

So:

• artista = artist
• la artista = the artist (female, in this sentence)

Leaving out the article would usually sound incomplete in a normal standalone sentence.

No. Artista is a common-gender noun. That means the noun itself stays the same, and the article tells you whether the person is male or female:

• el artista = the male artist
• la artista = the female artist

So the ending -a does not always mean a noun is feminine.

Expone is the third person singular present form of exponer.

So it can mean:

• he exposes / presents / sets out
• she exposes / presents / sets out
• it exposes / presents / sets out
• sometimes even you expose in formal usted language, depending on context

In this sentence, because the subject is la artista, it means the artist exposes/presents/sets out.

The infinitive is exponer.

In the present tense:

• yo expongo
• tú expones
• él / ella / usted expone
• nosotros/as exponemos
• vosotros/as exponéis
• ellos / ellas / ustedes exponen

A useful detail: exponer behaves like poner in some forms, especially yo expongo.

Spanish usually does not need subject pronouns as often as English does, because the verb ending already gives information about the subject.

Here, expone already tells you it is third person singular, and la artista clearly names the subject. So adding ella would usually be unnecessary.

Spanish prefers:

• La artista expone la idea.

rather than:

• Ella expone la idea.

unless you want extra emphasis or contrast.

Because idea is a feminine singular noun, and here it is a specific idea, so Spanish uses the definite article:

• la idea = the idea

This is very similar to English in this sentence.

Also:

• idea is feminine
• singular feminine nouns normally take la

Yes. In La artista expone la idea:

• La artista = the subject
• expone = the verb
• la idea = the direct object

You can ask What does the artist present/expose?
Answer: la idea

That is how you can identify it as the direct object.

Because the personal a is normally used before a specific human direct object, and sometimes pets or personified beings.

Examples:

• Veo a María.
• Escucho a mi profesor.

But la idea is a thing, not a person, so there is no personal a:

• La artista expone la idea.

Yes, but La artista expone la idea is the most neutral and standard order: subject + verb + object.

Spanish can change the order for emphasis, style, or context. For example:

• La idea la expone la artista.
  This puts more focus on the idea.

But for learners, the original sentence is the safest default pattern.

Not always in the same way as English expose. Spanish exponer can mean several related things depending on context, including:

• to present
• to set out
• to explain
• to exhibit
• to expose

So in a sentence like this, expone la idea often sounds more like:

• presents the idea
• sets out the idea
• explains the idea

The best English translation depends on the context.

Yes. The Spanish present tense can sometimes cover both a simple present and an action happening now, depending on context.

So La artista expone la idea can be understood as:

• The artist presents the idea
• The artist is presenting the idea

If Spanish wants to make the ongoing action especially clear, it can also use:

• La artista está exponiendo la idea.

But the simple present is very common and natural.

A simple Spain pronunciation guide would be:

• artista → ar-TEES-ta
• expone → eks-PO-ne

A bit more closely:

• artista ≈ /aɾˈtista/
• expone ≈ /eksˈpone/

Notes:

• r in artista is a tapped Spanish r
• the stress is on -tis- in artista
• the stress is on -po- in expone

It is completely singular:

• la artista = singular subject
• expone = singular verb form
• la idea = singular object

If it were plural, you might get:

• Las artistas exponen las ideas. = The artists present the ideas.