The answer is D. the way organisms grow and develop
Pathogens are harmful because they are tiny organisms like a bacterium, a fungi, or a virus that causes people to be sick. It causes diseases like the rhinovirus which is the cause of common cold. It is commonly found in hospital wastes and even the water used in swimming.
I think the answer is D
as A would mean that the abyssopelagic organisms would be best adapted and therefore a large biomass which isn't the case and it isn't B nor C so it must be D
Hope that helps
