Mitochondria is the control
Answer:
Fish have shown to improve their coloration when exposed to the sunlight. It's also beneficial for the fishes eating algae. Since the sunlight is stimulating algae growth there will be more algae.
Explanation:
The actual answer is, "A", an ocean trench.
You can find out more about them by researching them up on Google, it's only a few phrases and a hit on the enter key :P
This the respiratory system!
The major organ of the respiratory system is the lungs, and in the lungs the air gets divided among smaller and smaller tubes at the end of which the oxygen enters and carbon dioxide leaves the blood!
