Answer: Gastroenterology
Explanation: Gastroenterology is a branch of medicine concerned with digestive diseases. The practice of gastroenterology concentrates on the diagnosis and treatment of diseases involving the esophagus, stomach, small intestine, and large intestine (colon), liver, and pancreas. Examples of conditions treated: Abdominal pain.
Answer: Option C."hypernatremia"
Explanation:
Hypernatremia is defined as the a electrolyte problem in which sodium concentration rises to a value more than 145 mmol/L in serum.
The major symptoms of hypernatremia involves thirst, muscle twitching or spasms, and confusion.
Hypernatremia is a hyperosmolar condition caused by a decrease in total body water (TBW) against electrolyte content and several causes of hypernatremia includes intake of hypertonic fluid, salt poisoning in children, and inadequate intake of free water associated with total body sodium depletion et cetera.
Hence, the correct option is C.
Habitat loss..The most harmful threat to biodiversity is the D. Habitat loss.
It's not easy to live in a place that you no longer have any means of living. If ones organism loss his habitat, chances are they will extinct because of the absence of their basic needs.
Every time scientists make a new discovery, they add that knowledge and correct their older discoveries accordingly.