Answer:
<em>The correct option is D)  How is the number of frogs in Massachusetts affected by pollution</em>
Explanation:
A scientific question can be described as a question which can be answered through the scientific method of research. Based on the scientific question, a hypothesis can be formulated. For example, for the option D, the hypothesis can be 'if the pollution increases, then the number of frogs decreases.' A hypothesis is a tentative statement which can be tested through experiments. Based on these experiments, results are formulated and conclusions are drawn. The question mentioned in option D can be answered through this method hence, it is the correct option. 
 
        
             
        
        
        
Answer:
It should be D.
Explanation:
The invasive species will negatively effect the ecosystem and the natural predator in the area. Like the Blue Lobster problem in Maine.
 
        
                    
             
        
        
        
Things too small to be viewed by a light microscope can be viewed with an Electron Microscope
Hope this helps!
 
        
             
        
        
        
Answer:
The protein covering of a virus is called a capsid.