So you're looking for 2 synonyms. B is the best answer, avert and prevent are synonyms of each other. The other choices are antonyms, or they're at least not synonyms.
The topic sentence states this main idea.
The correct answer is C) Microphone. Hope this helps.
While there are many different sound devices that can be used in poetry, such as near rhyme (sounds are similar but not exact), alliteration (same beginning sounds), this one is onomatopoeia. Onomatopoeia is using words to suggest a sound. This can also be words like whispering, sizzle, thump, clang, etc. Using onomatopoeia allows you to imagine what it would sound like if you were present (this is part of imagery).