The best answer to the question above is letter C, damages the cells in a body.
A virus is a tiny organism which may lead to mild to severe illnesses in humans, animals and plants which includes flu or a cold to something more life threatening like HIV/AIDS.
Viruses cannot grow or multiply on their own. They are not alive, thus, they need to enter a human or animal cell and take over the cell to help them multiply. They can also infect bacterial cells.
