Question

in the immune system, who eats and kills the foreign invader? the macrophages the antigens the neurons

Explanation:

Macrophages are part of the immune system and perform phagocytosis, engulfing and killing foreign invaders. Antigens are substances that trigger an immune response, not the ones that eat invaders. Neurons are part of the nervous system, not the immune system.

Answer:

A. The macrophages