If the body loses a substantial amount of fluids and salts and they are not quickly replaced; for example: by drinking, the body starts to "dry up" or get dehydrated. Severe dehydration can cause death. The usual causes of dehydration are a lot of diarrhoea and vomiting
Ion transport or active transport depending on which situation you have.
The answer is B. Population
Mammal bird reptile amphibian plant Fish