D is the answer....tornado damage can not be used to determine both the weather and climate of a region
 
        
             
        
        
        
It helps with the optic nerve, if you give me options i can help answer. Sorry if I didnt help :)
 
        
             
        
        
        
Answer:
killer T
Explanation:
helper T activates killer T cells which literally kill the virus or bacteria.  memory T are the subset of an infection.
Please mark for brainliest!! :D Thanks!
For more questions or information, comment below.
 
        
                    
             
        
        
        
a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membran.