The whale's flipper and tail flukes and fish fins are analogous structure as they have different structural formation but they perform the same function. 
Flipper and tails are locomotory organs in the whale  and helps the whale in propelling similarly fins in the fish assist the fish in swimming. Both the strcutures have evolved differently and are made of different materials. 
 
 
        
             
        
        
        
I would asy thd answer would be d if its not my bad .
        
                    
             
        
        
        
ACHONDROPLASTI DWARFISM is a condition that is characterized as long, narrow trunk, short limbs and a large head. It is the most common type of dwarfism and it occurs in about 1 out of 40.000 babies. Other features of the condition include: protruding jaw, flattened bridge of the nose, forward curvature of the lower spine and bow legs.
        
             
        
        
        
I think this is actually a physics question- 
gravitational potential energy = mass*g*height. We know mass and g is constant, so all we need to know is the height of the basketball.
Hope this helps :)