Ev dekorasyonunda minimalist tarz artık daha popüler, çünkü sade ortamlar insanı dinlendiriyor.

Because ev dekorasyonu is a noun compound meaning home decoration / home décor.

• ev = house, home
• dekorasyonu = its decoration / decoration of the home

Then Turkish adds the locative ending -da / -de to mean in. After this kind of possessed form, a buffer n appears:

• ev dekorasyonu
  • -da → ev dekorasyonunda

So ev dekorasyonunda means in home decoration or in home décor.

Both are possible, but they mean slightly different things.

• minimalist tarz = minimalist style in a general, category-like sense
• minimalist bir tarz = a minimalist style, sounding a bit more specific or descriptive

In this sentence, the speaker is talking about the style in general, so minimalist tarz is natural.

Also, minimalist is simply acting like an adjective here, modifying tarz.

In Turkish, the verb to be is often omitted in the present tense, especially in 3rd person sentences.

So:

• minimalist tarz artık daha popüler literally looks like
• minimalist style now more popular

but it naturally means:

• Minimalist style is now more popular.

This is completely normal Turkish.

They do different jobs:

• artık = now, nowadays, by now
• daha = more

So:

• artık daha popüler = now more popular

The comparison is understood from context. It usually means more popular than before or more popular than other styles.

Çünkü means because. It introduces the reason.

So the sentence structure is:

• statement: Ev dekorasyonunda minimalist tarz artık daha popüler
• reason: çünkü sade ortamlar insanı dinlendiriyor

This is a very common and straightforward way to connect two clauses in Turkish.

• sade = simple, plain, uncluttered
• ortamlar = environments, settings, spaces

So sade ortamlar literally means simple environments/spaces.

In this context, it refers to simple, uncluttered interiors or surroundings.

Here insanı is the direct object of dinlendiriyor.

• insan = person / human
• insanı = the person / a person / people in general as an object

In Turkish, insanı is very commonly used in general statements to mean something like a person or people in general:

• Müzik insanı rahatlatır.
• Music relaxes people / a person.

So sade ortamlar insanı dinlendiriyor means simple spaces relax people.

Why not the others?

• insan would sound more incomplete or less natural here
• insanlar = people, but not in object form
• insanları would mean people as a plural object, and that is also possible in some contexts
• insana means to a person, which is a different grammatical role

No. They come from related but different verbs.

• dinlenmek = to rest
• dinlendirmek = to make someone rest, to relax someone

So:

• dinleniyor = is resting
• dinlendiriyor = is relaxing someone / makes someone feel rested

In this sentence, the spaces are not resting themselves. They are causing the person to feel rested. That is why Turkish uses dinlendirmek.

That is very normal in Turkish.

The -iyor form often corresponds to the English present continuous, but in real usage it can also describe:

• habits
• general tendencies
• current states
• things that are generally true in the present period

So dinlendiriyor here does not have to mean is relaxing right this second. It can mean:

• relaxes
• is relaxing
• has a relaxing effect

depending on context.

Because in Turkish, when the plural subject is already clearly stated, the verb often stays in the 3rd person singular form, especially with non-human subjects.

So this is perfectly natural:

• Sade ortamlar insanı dinlendiriyor.

A form like dinlendiriyorlar is possible in some situations, but here it would sound less natural. With non-human plural subjects like ortamlar, singular verb agreement is very common.

Yes, Turkish word order is flexible, but this sentence uses a very natural neutral order.

The original sentence sounds normal and clear:

• Ev dekorasyonunda minimalist tarz artık daha popüler, çünkü sade ortamlar insanı dinlendiriyor.

You can move parts around for emphasis, but not every rearrangement sounds equally natural.

For example, putting the because clause first is possible in speech, but Turkish often prefers a different structure if the reason comes first, such as:

• Sade ortamlar insanı dinlendirdiği için ev dekorasyonunda minimalist tarz artık daha popüler.

So the original version is a good standard model to learn.