Answer:
The answer to this question is D. They multiply rapidly to increase their population. I sure do hope this helped dear! XD
Explanation:
 
        
             
        
        
        
Answer:
C. Responsiveness and timing
Explanation:
I just know it, I really don't know how to explain
 
        
             
        
        
        
In the case of liquid droplets, including water, surface tension is the factor, which is accountable for their shapes and configuration. Though can easily be malformed, the droplets of water seem to be pulled into a spherical shape due to the cohesive forces of the surface layer.  
In the non-existence of other forces, involving gravity, the drops of almost all the liquids would be almost spherical.