wht is difference b/w threshold energy and activation energy?

in boltmann and maxwell fraction of molecule vs energy grap ?

explain with this grph..

Threshold energy and activation energy are same thing to define the minimum amount of energy required by reactant to convert into product.

It is very useful to know the types of proportion of atoms that have high enough energies to cause a chemical reaction when colliding. Gases can be plotted on a graph called the Maxwell-Boltzmann Distribution. It shows different atoms or particles, and their energies.

The rate of almost all chemical reaction increases with an increase in temperature. Particles that move fast collide more often and with greater kinetic energy. Effective collisions will increase exponentially with an increase in temperature