Probably the availability of each kind of food is different from the other. So the half of the species that has more food available would outcompete the other half. Therefore, the correct answer is C. One half of the species will outcompete the other half of the species.
Water diffuses into the skin via sweat ducts which alters the electrolyte balance. electrolytes can be salts like sodium and potassium. This alters the stability of neurons causing blood vessels to constrict therefore decreasing the amount of fluid in the fingers which would normally give the skin tension. The decrease causes wrinkles.
