I would go with A. The Life cycle of a plant.
Answer:
I am pretty sure it would be the second one.
Explanation:
I think this because the title of the paragraph is "Life Without Gravity" would mean to live without gravity, and the second one is talking about astronauts living without gravity.
Probably
A. food
hope i help :)
That he can't trust anyone and he never wants to go somewhere dangerous alone