Answer:
-energy
Explanation:
To break a chemical bond energy is required. When a bond is broken energy is released. Activation energy is the minimum energy required to start a reaction. The lower the activation energy the faster is the rate of the reaction. Reactants collide with each other to break bonds and new bonds are then formed leading to the formation of products. Reactants must have sufficient energy to collide with each so that they can break bonds.
