Free fall is a special case of motion with constant acceleration, because acceleration due to gravity is always constant and downward. For example, when a ball is thrown up in the air, the ball's velocity is initially upward.
        
             
        
        
        
Answer:
Amoebas have projections called pseudopods
Explanation:
Pseudopodia is the locomatary organ of amoeba. It helps them in movement and transportation.
 
        
             
        
        
        
Answer:
See below 
Explanation:
Find the NET forces on the objects 
A  20==>
B    0
C  30==>
D  15==>     
So biggest accel = C because it has the most force acting on it
  next is A because it has the next biggest force
     next is  D        then    B ...B has no net force acting on it