Natural selection and evolution are two terms that are sometimes confused, even by freshman biology students. what is the relation between natural selection and evolution

The theory of Natural Selection by Charles Darwin is considered to be the mechanism that would prove that the theory of evolution. In the theory of evolution, man is said the have the same ancestors as the current primate, closely to the chimpanzees. But this theory was considered bonkers as there were no mechanism on how the evolution of man happened. This is then explained the theory of natural selection by Charles Darwin. This theory rest upon the Malthusian principle of the scarcity of resources, thus surviving rest on whoever has the ability to adapt to their environment or coined as the "fittest". Those who adapt, most likely due to mutation have a better chance of surviving, thus passing on their mutations to the next generation. This mutations spurred more mutations that help the early human evolved to the current modern man. With that the theory of evolution is explained by the mechanism of natural selection.

I’m not really sure