Which description is not an example of an adaptation?

an individual choosing to put on a coat to stay warm

the white fur of polar bears

the secretions made by a clown fish to protect the organism from sea anemones

[content deleted] - user123802726recklesschicken

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

a chain link fence because there so tiny even my albino donkey can't get out