The first step is to first understand the collision theory.
The collision theory states that if two molecules collide with a certain kinetic energy, a new molecule is capable of forming.
Therefore, particles of the reacting substance must collide before a reaction can take place.
By increasing the temperature, we allow more room for the particles to move at a greater speed. This causes more collisions to happen, which would then increase the chance of a successful collision, which leads to an increase in the rate of reaction.