Answer:
C. Concentration gradient
<span>A form of massage that's a popular choice for dogs and horses is tTouch massage.</span> It is therapeutic massage for dogs and horses and promotes their health. It is done with fingers and hands all over the body of the dog. The movements are circular. The goal of the massage is to activate the function of the cells and awaken cellular intelligence of the dog.
Answer:
I'm pretty sure the answer is natural selection.
Explanation:
Natural selection acts on phenotypic variations in populations.
