ATP means adenine tri-phosphate, meaning that it contains 3 phosphates.
ADP means adenine di-phosphate, which means it only has 2 phosphates.
ATP is usable energy, whereas ADP is not able to be used until it adds another phosphate group and becomes ATP.
        
             
        
        
        
B. More studies will take place on the issue
is the most likely outcome.
        
                    
             
        
        
        
Population is a specific species and community is more so talking about all of the species as a whole in an environment.
        
                    
             
        
        
        
Answer:
Choose a specific topic related to nutrition, and do some research on it (Wikipedia is always a good place to start). Maybe look at a few health blogs for inspiration and just to see the writing style (be sure not to copy them though!)