What happens if the amount of energy that is absorbed by the reactants is less than the activation energy?

The reaction does not occur.

The reaction occurs very quickly.

The reaction occurs very slowly.

The reaction occurs spontaneously.

I believe the correct answer from the choices listed above is the first option. If the amount of energy that is absorbed by the reactants is less than the activation energy then the reaction does not occur. since the needed energy was not supplied. Hope this answers the question.