(A). moisture
(B). energy.
(C). voltage
(D). sunlight
(E). warmth
(F). photons
(G). matter
(H). air

Fact 1: Athermal insulator slows the transfer of heat. Fact 2: Heat is a measurement of transferable energy. Given the two facts above, a thermal insulator slows the transfer of?
Answer:
(B).