C
He needs an battery to make the simple electromagnet
Answer:

Explanation:
Let assume that gas behaves ideally and experiments an isobaric and isothermal processes. The following relationship is applied to determined the final volume:




Answer:
fitness. the ability of an organism to survive and reproduce in its environment. adaptation. the inherited characteristic that increases an organism's chance of survival.
<span>Calcitriol </span>is the active form of vitamin D. (D)