1. It should be C
2. It has to be B
Answer:
i dont think we can answer that if we havent read the passage or you havent showed it to us
Explanation:
Answer:
1. when asked which bird flies backwards, most people know it's a hummingbird.
2. Hummingbirds can fly forwards, fly backwards, and hover.
3. Nir Sapir, a scientist, used wind tunnels to study hummingbirds.