You know that Earth's crust is divided into tectonic plates that moves via convection cells within the mantle. As these plates move, three kinds of plate boundaries are formed: divergent, convergent, and transform plate boundaries. Not only do these boundaries form, specific
events occur at these boundaries

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.