Answer:
Option c==> Periods of fasting.
Explanation:
Erythropoietin is an hormone and in the bone marrow it helps in the synthesis or in the production of the red blood cells, also Erythropoietin can be used as medication in form of epogen to fight anemia is mainly produced by the kidney.
Increase or rise in the level of Erythropoietin is as a result of low oxygen level which may cause anemia. Also, the higher the altitude one go, the lower the oxygen level. Also, option 'a' that is the disruption in the flow of blood to the kidney also increase Erythropoietin levels.
Testing facilities that engage in animal testing dispose of both animals and dangerous chemicals, food waste, and a variety of supplies used during the testing process. Not to mention, animal testing has a heavy impact on water and air quality. Additionally, animal testing is cruel and ineffective. Animals don't get many of the diseases that humans do. For example, major types of heart disease, many types of cancer, HIV, Parkinson's disease, and schizophrenia. 100 million animals are killed each year due to animal testing.
