Answer:
Into the air.
Explanation:
I wasn't sure myself, but this seems like the only answer that sounds correct... I really hope this helps you! (If you would like an explanation, I can comment it below) xx
Answer a seems to be the best choice to use
The topic sentence should identify the main idea and point of the paragraph. To choose an appropriate topic sentence, read the paragraph and think about its main idea and point. The supporting details in the paragraph (the sentences other than the topic sentence) will develop or explain the topic sentence
