Which word or phrase best describes the audience’s role in experimental theater? active and engaged
unnecessary
passive observer
distracted or bored

active and engaged

Explanation:

By using audience participation, the performer invites the audience to feel a certain way and by doing so they may change their attitudes, values, and beliefs in regard to the performance's topic.

your answer is c) experiments with water vapor showed that elements combine in specific proportions.

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.