Answer:
c.) energy is transferred
Step-by-step explanation:
The chemical equations are balanced because of the energy conservation principle that states that the total energy of an isolated system remains constant in all chemical reactions, whether you have an exothermic, endothermic or reversible reactions. A chemical reaction by itself is a matter of energy transfer, the combustion process in a lighter, for example, generates a flame that gives out energy in the form of light, heat, and sound.