Plasmodia is your answer!!!!!!!!!!!XD
 
        
                    
             
        
        
        
Answer: Minerals 
Hope this helps!
        
                    
             
        
        
        
Answer:
in the explanation
Explanation:
The independent variable would be us humans polutling the ocean with oil and other plastics destroying the coral reefs. The dependant variable is an abbrasive species of fish becoming overpopulated and killing all the fish that help the coral grow causing the coral to die. (independant variable basically means humans tampering with it causing the problem. dependent is naturally occuring humans cant control whether a fish overpopluates or not thats natural)
 
        
             
        
        
        
Explanation: 
What would cause a tree to die?
There are 5 factors to which a tree eventually succumbs: death from its environment, death from harmful insects and diseases, death from a catastrophic event, death from age-related collapse (starvation) and of course, death from harvest.
I hope this helps
 
        
             
        
        
        
Not enough info, but I'd go with: 
B) hydrogen peroxide