Regulating body temperature is important for animals to maintain homeostasis. One way humans do this is through sweating. Horses are one of the few animals that also sweat to cool themselves. What does this common homeostatic mechanism indicate about humans and horses? A. They evolved the trait simultaneously . B. They are the two species that regulate body temperature . C. They share a common ancestor . D. They evolved in different environments .

The answer is option C "They share a common ancestor"

Explanation:

Homeostasis can simply be defined as the processes which animals needs to undertaken or the conditions animals exhibits to maintain a balanced or stable condition in the body system that are significant for the survival of the animal.

One of the ways animals maintain a stable state is regulating the body temperature through sweat and this process is peculiar to both Humans and Horses because the share a common ancestor considering Homeostasis to be a mechanism for evolution.