A) Marta was given a note by the teacher to take home to her parents.
A) Shelby visited the zoo's new panda exhibit.
The active voice occurs when the subject of the sentence performs the action indicated by the verb. Since the subject "acts upon" the verb in these sentences, then we call them "active." This is the case of the second sentence, in which Shelby <em>visited</em> the zoo. However, when the subject of the sentence is being "acted upon," then the sentence is passive. In the first case, Marta is the recipient of the verb, which makes the verb a passive one.
