The Cell Membrane is what controls what enters and leaves the cell.
        
             
        
        
        
The answer should be flammability
        
             
        
        
        
Yes. There is a substantial number of people ... members of Brainly as well as non-members ... students, puzzle solvers, and just average educated thinkers, who would be able to solve it.
        
             
        
        
        
A because its the only one that actually involves science