Answer:
1.) The Diagram A shown us is how the body is cold.
2.) The body temperature is cold, because body needs to be in the perfect temperature, if not, you will get sick of how cold you are.
3.) Nervous impulses sent to muscles generate extra metabolic heat through shivering. Blood vessels that would otherwise transport warm blood from the internal organs to the cold skin, where the blood would lose heat, constrict, constraining most blood, and its heat, to the internal organs.
Explanation:
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