Question

which of the following is part of the brain?
hypothalamus
calcitonin
endotherms
ectotherm

Explanation:

The hypothalamus is a part of the brain that regulates various functions such as body - temperature, hunger, and thirst. Calcitonin is a hormone, endotherms are animals that generate internal heat, and ectotherms are animals that rely on external heat sources.

Answer:

Hypothalamus