Thank you for posting your question here. Below are the choices that can be found elsewhere:
a. a new mutation allowed moths to survive
<span>b. the light moths had an advantage </span>
<span>c. the phenotype frequency changed </span>
<span>d. moths learned to adapt to their environment
</span>
The answer is C

The digestion of protein begins at mouth and it continues at stomach and small intestine.
Hope it helps:)
The carry the deoxygenated blood from the heart to the lungs and Pulmonary veins do the opposite!