Question

__________ attack viruses & other foreign invaders that enter our bodies. they help prevent us from getting sick. dna white blood cells red blood cells vaccines rewatch

Explanation:

White blood cells are part of the immune - system and attack foreign invaders like viruses to prevent illness. DNA is genetic material, red blood cells carry oxygen, and vaccines are substances to stimulate immunity, not the cells that directly attack invaders.

Answer:

White blood cells