Convection
because convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Answer: helium
Explanation:
Edit: im really sorry i thought i was answering a different question.
Energy=mass x the speed of light squared.
Carbon dioxide and Water are the products of cellular respiration.
