Mudskippers are a species of fish which, over thousands of generations, have developed adaptations that allow them not only to survive outside of
the water, but to actually travel from one water source to another. What
environmental condition most likely led to these adaptations?

a) lower temperature
b) frequent drought
c) larger predators
d) increased population

D. Digestion increases as the volume of the enzyme increases.

Explanation:

Enzymes speed up reactions by reducing the activation time of a reaction. If there are more enzymes therefore, the reaction will move faster.

Pepsin is an enzyme that prefers acidic conditions so it can work with dilute HCL. It can also work in temperatures of 40 °C without getting denatured. As more Pepsin is added therefore, the reaction will move faster and digestion will increase.