Answer:
B. The pancreas releases glucagon.
Explanation:
Glucose is a source of energy in human body and required to perform any action.
When blood glucose levels fall below normal the pancreas releases glucagon. glucagon is a form of stored sugar present in the liver and provide instant energy when required. Glucagon enters in the bloodstream and level the fall in blood glucose level.
Insulin is released when blood glucose level is higher than normal.
Hence, the correct answer is "B. The pancreas releases glucagon."
