Increasing the temperature increases the rate of reaction by:

Explanation

Increasing the temperature increases the kinetic energy of molecules, which leads to more frequent and effective collisions between reactive molecules. This results in an increased rate of reaction. Unlike the activation energy, which remains constant for a given reaction, the energy of the molecules changes with temperature, enabling them to overcome the activation energy barrier more easily. Thus, the correct answer is that increasing temperature increases the frequency and effectiveness of collisions, not altering the activation energy.