Whether the subject names the actor or the receiver of the action expressed by the verb is the determinated by the verbs

mood
tense
voice

Voice

Explanation:

The grammar voice of a verb defines who or what the speaker wants to put emphasis on: the subject (the doer of the action) or the receiver of the action. There are two types of voices: the active voice, in which the subject performs the action denoted by the verb, and the passive voice in which it is mentioned who or what receives or experiences an action.

Examples:

Your cat attacked my dog! - Active

My dog was attacked (by your cat)! - Passive

b because i dont see anything