Answer:
 Mid-ocean ridges 
I think
        
             
        
        
        
Answer:
D. It can act as an enzyme
 
        
             
        
        
        
Answer:
B. A biodiverse ecosystem harbors many interactions, thus a  disturbance may impair some interactions, but not all.
Explanation:
Biodiversity is the variation of life forms in an environment. This is as a result of available nutrient and energy to support the various life forms. 
- The relationship between biodiversity and rebound from disturbance is such that a biodiverse ecosystem is able to resist any change. 
- The disturbance might affect proportion of the populace. But on the long organisms can survived and be propagated again.
 
        
             
        
        
        
When energy passes from one trophic level to the next, I would guess that the two factors which decrease the total amount of energy from being passed up are: 
1. An organism does not assimilate all the energy of food consumed. Within a consumer, digestion and assimilation of energy is not 100% efficient: some of the energy is lost.
2. A large proportion of energy assimilated by a producer and consumer is lost through respiration, i.e., day-to-day maintenance of metabolic processes.