an increase in temperature affects the reaction rate by\ndecreasing the velocities of particles that collide…

an increase in temperature affects the reaction rate by\ndecreasing the velocities of particles that collide in the reaction.\nincreasing the number of molecules that have sufficient kinetic energy to react.\nincreasing the number of molecules that have sufficient potential energy to react.\ndecreasing the energy that particles need to overcome the energy activation barrier.

an increase in temperature affects the reaction rate by\ndecreasing the velocities of particles that collide in the reaction.\nincreasing the number of molecules that have sufficient kinetic energy to react.\nincreasing the number of molecules that have sufficient potential energy to react.\ndecreasing the energy that particles need to overcome the energy activation barrier.

Answer

Brief Explanations:

Increasing temperature gives molecules more kinetic energy. More molecules then have enough energy to overcome the activation - energy barrier and react. It doesn't decrease particle velocities, doesn't directly affect potential energy in this context, and doesn't change the activation - energy value itself.

Answer:

increasing the number of molecules that have sufficient kinetic energy to react.