The answer is jellyfish B

In humans, the medulla region of the brain is mainly responsible for the regulation process of respiration. It is also called the respiratory rhythm centre. The chemosensitive area located near the respiratory centre sends signals across nerve impulses to alter the rate of expiration to eliminate compounds.
Answer:
the first one is plants
the second one is animals
the third one is plants
the fourth one is animals
None...........................probably mars