All of the following are ways that animals maintain homeostasis and cool down except flapping their wings.

sweating.

panting their tongues.

the production of goosebumps.

flapping their wings

Explanation:

Homeostasis is a phenomenon which involves the ability for an organism to maintain a stable internal environment despite fluctuations in the external environment. Homeostasis is important for the survival of living organisms as their cellular functions depend on it.

One of these environmental conditions is heat/hot temperature. Animals need to maintain a stable internal internal temperature despite the change in environment's. Animals do this by cooling down via various ways which include the following:

- Animals like apes, primates possess sweat glands like humans and hence cool down by SWEATING

- Animals like dog quickly exhale hot air and bring in cool air in a process called PANTING to cool down.

- Production of GOOSEBUMPS in animals help their hairs to stand in adverse weather conditions

Note that bird flap their wings in order to support flight and not perform an homeostatic process like cooling down.

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(nitrogen fixation) will be your answer sorry if im wrong