It is mostly likely the cell membrane.
The cell membrane is a structure of a cell composed of double layer of lipids and proteins. It surrounds a cell and separates the cytoplasm from its surrounding environment. The cell membrane is selectively permeable (semi-permeable), which means that it only lets certain molecules enter and exit. It can also control the amount of some substances that go into or out of the cell.  
 
        
             
        
        
        
When hurricane move over land they start to get weaken quickly and start to lose speed and energy because they no longer have the fuel they need which is warm moist air above the sea. 
        
             
        
        
        
Answer:
hope i helped but i think its b or d
Explanation:
 
        
                    
             
        
        
        
Answer:
each mile is an hour
Explanation:
 each mile is an hour depending on how fast your going like when ur in bed with another person. feels good and fast at the same time to reach the destination