PLEASE HELP ME : IT'S ABOUT SCIENCE Energy is the ability to do work, and to do work means to move something. Every time you or any of your cells move (which is all the time), you are using energy. Humans get all of our energy from eating things. Plants get their energy from the sun. In fact, nearly all the energy on our planet comes from the sun.

Because the sun is a giant fusion reactor, it constantly bombards Earth with energy, which is transferred, stored, and used in many ways. Energy conversion is the transfer of energy from one form to another. For example, chemical energy is stored in the cells of green plants through a process called photosynthesis. This chemical energy started as solar energy, which was converted through a chemical process. The light energy breaks down the chemical bonds in carbon dioxide molecules and converts them to oxygen and carbohydrates (molecules of hydrogen and carbon). When you eat something, the muscles in your body use this stored chemical energy from the sun by splitting the carbohydrate molecules to gain their stored, potential energy.

Most of the energy on Earth comes from

A) chemicals.

B) the sun.

C) photosynthesis.

D) carbohydrates.