Q: A catalyst decreases the amount of what resource that is required in order to begin a chemical reaction?


Read this paragraph and choose the correct option from the provided answers:

Catalysts are not reactants, but they help reactants come together so they can react. You can see one way this happens in the animation at the URL below. By helping reactants come together, a catalyst decreases the activation energy needed to start a chemical reaction. This speeds up the reaction.

 Choices:

- positive energy

- motion energy

- kinetic energy

- activation energy


A:
activation energy