Answer:
A
Explanation: Ex: heavy fur coat great in Alaska, bad in Florida
Not B: organizms can learn behaviors but adaptation is biological.
Not C. Answer is not for basic biology.
Not D: Competition varies under factors such as environment.
When the environment varies the organism starts to adapt by making changes in the phenotypes. These include behavioral and morphological traits. These traits are modified through evolution.
Hence the correct option is A.
Learn more about the certain traits adaptations in one environment, but not in another.
brainly.com/question/20371024.