The correct answer is D. RAMP because you use a ramp to reduce the amount of force needed to that work force. Hope This Helps!
 
        
             
        
        
        
Answer:
SARS- CoV- 2 is a virus that infects human by the oral-respiratory way in which the virus enters the body and these viruses have spikes on their surface made of spike proteins that allow these viruses to bind with the infected cell.
The infected cells have ACE2 receptor that is protein present on the surface of the human cells. Binding allows the structural change in the virus to fuse and enter in the cell where viruses reproduce them selves with the cell with cell system.
 
        
                    
             
        
        
        
Answer: I think its cells
Explanation:
Viruses dont have cells
 
        
                    
             
        
        
        
The answer is C because the retina is the part of your eye that transmitts the image to your brain