Answer the following question: Fact 1: Evaporation of sweat uses energy, and the energy comes from body heat. Fact 2: Energy is the body's fuel. Given the two facts above, what powers sweat?

Available options:
(a). heat produced
(b). The body's fuel
(c). a gas in the air
(d). hydration
(e). When the water is hot
(f). air cools
(g). matter vibrating
(h). Cooling vapors
Answer:
(b).