First  you  determine  the   total mass  of  the   strawberries used
Then  determine  the    mass  of  the   DNA  obtained  from  the  strawberries
percentage  mass  is  therefore  equal  to  mass  of  the  DNA  obtained  divided  by  total  mass  strawberries  multipy  by   a  100
        
                    
             
        
        
        
Answer:
The answer would be A, and C. 
Explanation:
I just know...MAybe,,?
 
        
             
        
        
        
B, for sure. Producers, Like grass and Flowers need water to make food. Consumers, like Cats, Snakes and Boars need water to drink so our internal systems will function properly. 
Im not sure if decomposers need water, but if there is less water then more animals die and they get food. so, not sure about that one.
        
                    
             
        
        
        
Probably the U.S. Environmental Protection Agency also known
as the EPA.  They are charged with
protecting people and the environment by enforcing regulations that prevent
pollution.  If they find any violation
committed they can impose sanctions and fines as well as imprisonment depending
on the nature of the offense.