Radioactivity due to heavy elements
Friction caused by earths fast rotation
Answer:
Estrogen levels days prior to ovulation
Explanation:
Estrogen is responsible for the reproductive system in women and high levels occur naturally during menstruation as compared to glucose levels in blood as the pancreas is constantly producing more insulin to lower the glucose in blood.
Jackals were one of the most breaded animal for fur coats in the 19th century
