Answer: The word "vivacious" means "full of animation, lively".
Explanation:<u></u><u>"Vivacious" is an adjective used to describe someone as lively, that is to say as being active and full of life</u>. In other words, "vivacious" means <u>"animated" and "enthusiastic".</u> An antonym of "vivacious" is "boring" since it is used to describe someone as the exact opposite: as "insipid" and "uninteresting". In the sentence provided,<u> "vivacious",</u> as well as "energetic", <u>is describing the noun "cheerleaders". </u>
I think the answer is B. Forced vibrations, such as those between a turning fork and a large cabinet surface, result in a much lower sound than was produced by the original vibrating body.