Lupus, a condition in which the body attacks its own cells, is an example of
1-an allergic disorder.
2-an immunodeficiency disorder.
3-a cancer of the immune system.
4-an autoimmune disorder.

Option 4, an autoimmune disorder, is the correct answer.

Explanation:

An autoimmune disorder can be described as a disorder in which the immune cells of a body attack the own cells of a body.

Lupus can be described as an autoimmune disease which is long termed. In this disorder, a person's immune system attacks its own healthy cells. The immune system is unable to differentiate between the pathogenic cells and the healthy cells of the body. As a result, tissue damage is caused.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.