Answer:
The correct answer is "It increases the number of collisions between reactants".
Explanation:
In chemistry, activation energy is defined as the amount of energy needed for compounds to perform a chemical reaction. Thermal energy decreases activation energy, which results on higher reaction rates. This is explained by the increase of entropy that results by increasing the thermal energy, which increases the number of collisions between reactants. Compounds and particles only react when they collide, if the particles are heated they move faster and collide more frequently.