with the prey there is always going to be something that is going to eat them it is called the food chain
 
        
             
        
        
        
The plasma membrane needs lipids, which make a semi-permeable barrier between the cell and its environment. It also needs proteins, which are involved in cross-membrane transport and cell communication, and carbohydrates, which decorate both the proteins and lipids and help cells recognize each other. Hope this helps :)
 
        
             
        
        
        
B is the answer?!? Sorry if im wront