Answer:
They protect you against illness and disease. Think of white blood cells as your immunity cells. In a sense, they are always at war. They flow through your bloodstream to fight viruses, bacteria, and other foreign invaders that threaten your health.
D. the number of mates on the island
their appearance changes cause different birds breeding together can make an impact of how the bird looks
the answer is B. grasp the loose skin on the back of its neck
