Pls ASAP are caused by the body attacking itself.
A.
Immune diseases
B.
Chromosomal diseases
C.
Single-gene diseases
D.
Autoimmune diseases

D.Autoimmune diseases

Explanation:

The body is composed of trillions of cells and when these cells are sick and dying they need to be removed. Macrophages are one type of cell that consumes the dying or infected cells to maintain a healthy body. Cells in the body can sense when they are infected by a bacterium or virus, because of the presence of foreign molecules produced by the pathogen. The infected cell uses these foreign molecules to call for macrophages to come and phagocytose the infected cell. When the infected cell is digested, the virus and bacterium will also die and will not be able to reproduce and infect other cells. Sometimes, the immune system gets an incorrect message, and it attacks cells that are not infected or dying. This causes allergic reactions or autoimmune diseases. Current treatments for autoimmunity only help with the patient’s symptoms by decreasing pain or inflammation or by suppressing the immune system.

starvation is bad because your body needs nutrition and to deprive it of nutrition can cause problems with both health and fitness.

explanation:

it can make weight loss slow down over time, but it won't cause someone to gain weight depsite restricting calories. starvation causes weakness in the senses like thirst.