Which of the following best describes an example of a specific immune response to pathogens?

cytotoxic t cells are activated and destroy cells that pathogens have invaded.
fever increases body temperature and speeds up the body’s reaction to pathogens.
phagocytes identify cells invaded by pathogens and mark them for destruction.
mucus traps pathogens and destroys them before they can enter the body.

Mucus traps pathogens and destroys them before they can enter the body.

Explanation:

Mucus is a thick viscous liquid secreted by the mucous membranes typically present in the salivary and nasal glands. The mucous secreted by these glands capture the entering disease causing pathogens inside the body. The minute single celled pathogens get stick to the viscous mucous. The mucous destroys these pathogens and prevents the cause of disease.

answer: 2

explanation:

yes

the denominator has a very specific role.