Which of these is the correct definition of the active voice?

The verb form that gives a command or advice

The voice of a verb in which the subject performs the action of the verb.

The voice of a verb in which the subject receives the action of the verb.

The form of a verb that shows the manner or mode in which a thought is expressed.

The correct definition of the active voice is:

The voice of a verb in which the subject performs the action of the verb.