Answer:
rugae or gastric folds 
Explanation:
not totally sure but i think so
 
        
             
        
        
        
The answer is B.
I think its safe to assume we all have had a cup of ice water. The ice always floats at the surface of the water.
 
        
             
        
        
        
Answer:
C. 
Explanation:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.