Explanation:
adrenocorticotropic hormone= It stimulates the adrenal cortex.
The main difference between the organisms are the uses of the appendage and the size and number of certain bones. The human arm is used for a variety of functions while the lizard's and the cat's are used for walking an climbing, the whale's for swimming, the frog's for support and the bird's and the bat's for flying.
Either A or C, however I lean towards C more.
D is obviously not the correct answer as Social Media is typically fairly biased while B is able to be edited by the public.
Hope this helps!