Can u pls help me for these two questions plz

Answer:
A for the first one
either b or a for the second one.
Explanation:
its been a hot minute but i took bio so place ur bets my dude
Answer:
Reproduction
Through process of elimination I would put cannot make enough ATP
Explanation:
Reproduction is not essential for the survival of an individual organism. However, it is essential for the continuation of an organism's species.
Oxygen helps form ATP so without oxygen you can't make ATP