Answer:
1. Exothermic reaction
2. Is being released
3. The energy comes from the change in energy between reactants and products
Step-by-step explanation:
The reaction is producing energy. A reaction that produce energy is called a Exothermic reaction.
As the energy is produced, the energy is being released.
As you can see in the image, the energy of the reactants is higher than the energy of the products. This change of energy in the chemicals produce the production of energy as heat.