Choose the option that is the passive form of the sentence.

You have not yet responded to several of my complaints.

Several of my complaints have not been responded to yet.

In the active voice sentence, "You have not yet responded to several of my complaints," the subject (You) performs the action (have not yet responded) on the object (several of my complaints).

To convert the sentence to passive voice, we make the object (several of my complaints) the subject of the sentence and use the auxiliary verb "have been" along with the past participle form of the verb "respond" (responded). The agent or the doer of the action (You) is not mentioned explicitly in the passive voice.

Therefore, the passive voice sentence is: "Several of my complaints have not been responded to yet."

The other options are incorrect:

1. "Several of my complaints are not being responded yet" uses the present continuous tense ("are being responded") but does not match the tense of the original sentence, which is in the present perfect tense.

2. "Several of my complaints you have not been responded to yet" changes the word order and is not the correct passive construction. The preposition "to" should come before "you" in this case.

3. "My complaints are not been responding yet by you" is not grammatically correct. The passive voice structure should use the auxiliary verb "have been" instead of "are been," and the preposition "by" should come before "you."

Therefore, the correct option is: "Several of my complaints have not been responded to yet."