Hydrolysis of ATP provides the energy that is needed to drive the electrolytes pumps. Energy is needed for these pumps to function because they are active form of transportation which the body use to move electrolytes from one point in the body to the other.
Your answer should be D. About 4 years. Hope this helps! =^-^=
<em>(The light reflected from the surface of the Moon takes only a second to reach Earth. The Sun is more than 8 light-minutes away. And so, if the light from the nearest star (Alpha Centauri) takes more than 4 years to reach us, we're seeing that star 4 years in the past.) Quora.com</em>
<span>c. The molecules are closer together as a gas than they do as a liquid.</span>
In a endothermic reaction energy from an outside source is continuously being added.