Answer:
The correct answer is : "D) Organisms who are able to grow fur to stay warm "
Step-by-step explanation:
As a colder and drier climate becomes, the humidity or the partial pressure of water in the environment or the atmosphere is low, generating much harsher frosts or frosts where it is more unsustainable for those who do not have a body temperature balance mechanism.
That is why the best adapted would be those that trigger a phenotypic expression of plumage or fur that is suitable to maintain body temperature in low ambient temperatures.