What is the best definition of “Energy”?A. Energy is what it takes to drive our cars,light our homes, and heat our houses. B. Energy comes from the sun in the formC. Energy is a power over timeD. All of the AboveAnswer: (D) Energy causes thingsto move, run, change or happen. Energy can be transformed or changedfrom one form to another. Each time energy changes form, some ofthe energy is converted into heat energy and dissipated into theenvironment. Energy has many uses. All people use energy and otherresources for their basic needs and to increase their material standardof living. People use energy to heat and cool their homes, to runtheir appliances, to power their cars, and to make goods and service. Energy has become increasingly important to industrial societiesand has taken on a central role. There are renewable and nonrenewablesources of energy. Each energy source has pros and cons environmentallyand economically that can and should be compared. The Sun is the source of almost all of our energy! Physicists believe that in the center of the sun there is a constantnuclear reaction happening. From crashing two hydrogen moleculestogether a helium molecule is formed as well as a huge amountGreat! So we are getting bombarded with energy from the sun,but what is it?