Homeostasis refers to an organism s ability to
a. maintain stable internal conditions.
b. compete for living space.
c. dissolve chemicals.
d. obtain energy.

Homeostasis refers to an organisms ability to maintain internal stability.
so the answer is (A)
for example, when you're feeling cold, your hair starts pointing upwards and you shiver, and sometimes get goosebumps.

The answer is A , maintain stable internal conditions.

because Homeostasis refers to an  organisms ability to maintain stable.

It is called the medulla oblongata or people usually call it medulla. it is the lower half of the brain stem continuous with the spinal cord.