Its an example of Drug abuse
Being overweight increases your risk for Type II diabetes.
They got used to it or invented something that made it easier to live in that environment
Answer: The thyroid gland is responsible for producing thyroid hormone (T4 and T3), which is involved in regulation of metabolism, bowel function, heart rate, temperature sense, menstrual regularity, and other functions. The thyroid is controlled by the pituitary gland in the brain.
Explanation: Hope it helps