Question

activation energy is
the energy needed to start a reaction.
the same as heat energy.
stored energy.
the energy of motion.
the energy in chemical bonds.

Explanation:

Activation energy is defined as the minimum amount of energy required to initiate a chemical reaction. Heat energy is different and involves transfer due to temperature differences. Stored energy can refer to potential energy in general. Energy of motion is kinetic energy. Energy in chemical - bonds is bond - energy. Activation energy is specifically for starting a reaction.

Answer:

the energy needed to start a reaction.