It can hurt and harm the body on many different and levels 
        
                    
             
        
        
        
I think the answer is Snow flakes
        
                    
             
        
        
        
It means the speed of the object is increasing
and
there is a positive acceleration in the direction of the velocity
hence
there is a force acting on the object, in the direction of the velocity
        
             
        
        
        
When your head sticks out of the water the upthrust reduces as your head is no longer displacing water, and there is 0 resultant force so you float at that level. hope this helps, can i get brainliest please