Choose the active form of the sentence given below. 

The application form for the art academy was submitted by Damian last night. 

Correct option is D)

A sentence is usually in active voice, when the subject performs an action toward an object. When the sentence is changed to passive voice, the object takes the place of the subject, preserving the meaning.
For example: I helped you. (Active voice)
                       You were helped by me. (Passive voice)
The verb that 'expresses the action (helped) done by the subject (I)' is in the active voice.
The verb that expresses what is done to the subject is in the passive voice.
Damian is the subject of the sentence, and 'was submitted by' is the verb in the passive form.
D is in the active voice among the options: Damian is the subject who performs (submits) the action toward the object (the application form). Hence D is correct.
Option A has changed in meaning 'was forced to'. Moreover, the sentence is still in passive form. It refers to an action performed 'by' the subject, whereas the active voice refers to an action performed by the subject.
Option B has also changed in meaning; 'took the decision' and 'because of his father's interest' are unnecessary extensions. The main sentence makes no mention of his decision or his father's interest.
Option C's format has also changed: is responsible for his submission'. The verb 'submitted' has changed to a noun 'submission' and a new verb 'is' is introduced.
Because A, B, and C are not the active voice of the given sentence, they are incorrect.