Hiv damages the immune system, allowing infections to develop that the body would normally cope with easily. what are these infections called?

Opportunistic infections

Explanation:An opportunistic infection is an infection caused by pathogens (bacteria, viruses, fungi, or protozoa) that take advantage of an opportunity not normally available, such as a host with a weakened immune system, an altered microbiota  or breached integumentary barriers.

i think the answer is a.keratin is the pigment responsible for skin color.