Этот вопрос волнует меня.

Because вопрос is a masculine singular noun, and the demonstrative этот has to agree with it in gender, number, and case.

• этот = this (masculine singular)
• эта = this (feminine singular)
• это = this (neuter singular)
• эти = these (plural)

So:

• этот вопрос = this question
• but это by itself is usually this/it as a pronoun, not the adjective form used before вопрос.

Вопрос is in the nominative case because it is the subject of the sentence.

In Russian, the thing that causes the feeling often becomes the grammatical subject:

• Этот вопрос = the thing causing concern
• волнует = worries/concerns
• меня = me

So the structure is literally something like:

This question worries me.

Because меня is the accusative form of я.

• я = I
• меня = me

The verb волновать takes the person affected as a direct object, so Russian says:

• Этот вопрос волнует меня
  literally: This question worries me

Not:

• Этот вопрос волнует я ❌

A useful pattern to remember is:

• Что-то волнует меня = Something worries/concerns me

Because Russian often expresses this idea differently from English.

In English, we commonly say:

• I’m worried about this question
• This question worries me

Russian often prefers the second type of structure with волновать:

• Этот вопрос волнует меня

So instead of making I the subject, Russian makes the question the subject.

This is very common with emotion-causing verbs in Russian, compare:

• Это интересует меня = This interests me
• Это удивляет меня = This surprises me
• Это беспокоит меня = This bothers/worries me

Here волнует means something like:

• worries
• concerns
• troubles

Depending on context, волновать can also mean to excite emotionally or to stir up feelings, so it is a fairly broad word.

In this sentence, the most natural sense is:

• This question worries me
• This question concerns me

Because the subject is этот вопрос, which is singular.

The verb agrees with the subject:

• вопрос = singular
• so the verb is волнует = he/she/it worries, is worrying

If the subject were plural, you would use волнуют:

• Эти вопросы волнуют меня = These questions worry me

Yes. Russian word order is flexible, and changing it usually changes emphasis, not the basic meaning.

All of these are possible:

• Этот вопрос волнует меня.
• Меня волнует этот вопрос.
• Волнует меня этот вопрос. (more marked or expressive)

A rough difference:

• Этот вопрос волнует меня. = neutral, starting from this question
• Меня волнует этот вопрос. = puts more focus on me / my concern

For a learner, the first two are the most useful.

Yes, absolutely. It means the same thing.

Many learners will actually hear this version very often because it starts with the person affected:

• Меня волнует этот вопрос = This question worries me / I’m concerned about this question

This version can feel slightly more natural in some contexts if the speaker wants to emphasize their own concern.

Yes, волновать is an imperfective verb.

That matters because Russian uses the imperfective for:

• ongoing states
• repeated situations
• general present meaning

So волнует means:

• is worrying
• worries
• concerns

If you wanted a perfective idea such as to upset suddenly or to cause agitation once, Russian might use a different verb, often взволновать.

But in a normal present-tense sentence like this, волновать is exactly what you want.

Yes. That is one reason learners sometimes find this verb tricky.

Depending on context, волновать can mean:

• to worry
• to concern
• to stir emotionally
• to excite

For example:

• Эта новость меня волнует could mean This news worries me
• in another context, a related idea could be emotional excitement rather than anxiety

In Этот вопрос волнует меня, the usual interpretation is This question concerns/worries me, not excites me.

Good question: меня can be either accusative or genitive, depending on the sentence.

Here it is accusative, because it is the direct object of волнует.

Compare:

• Он видит меня. = He sees me. → accusative
• У меня нет времени. = I don’t have time. → genitive after нет

So in Этот вопрос волнует меня, think of меня as simply me receiving the action.

Yes, it could.

• Этот вопрос волнует меня
• Этот вопрос беспокоит меня

Both can mean This question worries me, but there is often a slight nuance:

• волновать = to concern, worry, emotionally stir
• беспокоить = to bother, trouble, make uneasy

In many contexts they are close, but волнует can sound a bit broader and less purely negative.

The main stresses are:

• Э́тот вопро́с волну́ет меня́.

A rough pronunciation guide:

• Э́тот = EH-tuht
• вопро́с = va-PROS
• волну́ет = val-NOO-yet
• меня́ = mi-NYA

The stressed syllables are important in Russian, especially in words like вопрос, волнует, and меня.