Acceleration is the rate of change of velocity with time.
        
             
        
        
        
Analogous structures are those structures in different species which perform the same function, have similar appearance and structure but are not evolved together; therefore do not share a common ancestor. Homologous and analogous organs video explains in a simple way.
 
        
             
        
        
        
Answer:
 by moving between defined energy levels 
 
        
             
        
        
        
Answer:
The model cannot show how light bends.
Explanation:
 
        
             
        
        
        
The answer would b B, a leaf blowing across a field. 
hope this helps.