PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

I think the answer is B.

Explanation:

I think this because they have these variations to better adapt to conditions in their environments.

D) An arctic fox changes its colour over time because it migrates to an area with a different climate.

Explanation:

The genetics of the aninal have changed due to a change in environment.

answer; hypnagogic sensations)

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.