There is sentence:

Marie aime la peinture.

and question for it:

Marie aime-t-elle la peinture ?

Why it cannot be:

Aime Marie la peinture ?

? Why in question Marie is still placed at first position and 'elle' is added to question after verb?

Source: http://www.frenchtutorial.com/standard/interrogative/convert.php

There is this sentence:

Marie aime la peinture.

and the question for it:

Marie aime-t-elle la peinture ?

Why cannot it be the following:

Aime Marie la peinture ?

Why is Marie placed at first position and 'elle' is added after the verb? (source)