Answer:
cardiovascular
Explanation:
Through vasodilatation or vasoconstriction in the skin heat exchanges with the outside can be regulated. For example during vasodilatation more blood flows, so the tissue will be warmer and more heat will be lost.
That's how dogs and humans cool off
"B. Allows nature to
<span> produce favorable traits quickly and precisely" would be the best option. Genetic engineering is allows for the creating of an animal or plant that would most likely not be born naturally. </span>
