Active voice is a sentence form wherein the action, represented by the verb, is done by the subject. Therefore, the sentence that is written in the active voice is, option B. Scientists found a perfectly preserved woolly mammoth frozen in ice. The subject in the sentence is the word "scientists" and the action word "found" is done by the subject.
What this makes me think about is "listening to what others have to say is a way for me to be respectful about what their opinion or subject is about."
