What is activation energy?(1 point)

Responses

the kinetic energy of the reactants of a system after the reaction has begun
the kinetic energy of the reactants of a system after the reaction has begun

the energy released when atomic bonds are broken
the energy released when atomic bonds are broken

the total potential energy of the bonds of the reactants in a system
the total potential energy of the bonds of the reactants in a system

the energy that must be added to a system to break the bonds of the reactants
the energy that must be added to a system to break the bonds of the reactants

the energy that must be added to a system to break the bonds of the reactants