ANSWER A.Travis’s heart pumps more quickly to allow oxygen to be removed from the air and transported to the tissue.
The answer is "C".<span>
It learns to respond appropriately to stressor. </span>
<span>Human body is an amazing mixture of muscles and
intelligence, when a situation arises which is tiresome the body automatically
starts adjusting to its possible limits and when the situation is repeated it
responds appropriately. </span>
