B. Density has been decreased Or D.
        
                    
             
        
        
        
Answer:
A. insects fly around a bright lamp at night
Explanation:
insects are naturally attracted to light  due to presence of positive phototaxis.  Insects revolve around the light in the same way as electrons do around the nucleus. 
 
        
             
        
        
        
I believe the correct answer from the choices listed above is option 4. This type of research is often successful in advancing knowledge regarding the functioning of human cells because <span>cellular research using mice can always be applied to human cells since all complex organisms produce the same proteins.</span>
Hope this answers the question. Have a nice day.
        
             
        
        
        
Answer:
I read about this earlier im pretty sure its The "They need oxygen" part
Explanation:
:)
 
        
             
        
        
        
Answer:
Men are, in general, more muscular than women. Women are just over half as strong as men in their upper bodies, and about two-thirds as strong in their lower bodies