What is the immune system?

A. The group of cells and organs that protect the body from disease.

B. A group of cells that undergoes apoptosis to protect the body.

C. A group of organelles that digest particles that invade the cells.

D. The group of cells and organs that turn food into energy for the body.

a .

Explanation:

a group of cells and organs that protect the body from disease

B

Explanation:The immune system is a host defense system comprising many biological structures and processes within an organism that protects against disease. ... Even simple unicellular organisms such as bacteria possess a rudimentary immune system in the form of enzymes that protect against bacteriophage infections.

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.