1. The word voice, when it is used as a verb, means "to speak out loud." Explain how this word is changed by the addition of the prefix un- and the
suffix -ed.
(My perspective grade 10 volume 1 “house taken over” word study pg.46)

Explanation:

There's something very odd about the way you are defining voice, especially if it is a school text. Usually it is about active or passive.

is an example of active and passive (see below).

But to use it as you have, unspeak is not a word. Sorry it really is a word. It means to take back what you have just said. The word is archaic (it is no longer in use).

The proper past tense of speak is spoken. It is not correct to use speaked. My spell check has underlined both words (unspeak and speaked) which means it doesn't think they are words, or nothing it knows.

Finally voice.

Passive voice the subject is acted upon by the object. The mouse was eaten by the cat. Mouse is subject. Cat isn't.

Active voice. the subject does the acting. The cat ate the mouse. The cat is doing the acting.

i think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong