How is the process of natural selection involved in evolution?

Natural selection is a simple mechanism that causes populations of living things to change over time. In fact, it is so simple that it can be broken down into five basic steps :  Variation, Inheritance, Selection, Time and Adaptation.

Through this process of natural selection, favorable traits are transmitted through generations. Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.

Example of natural selection at work is the origin of giraffes' long necks. The ancestors of modern giraffes were animals similar to deer or antelope, with necks of ordinary length. Another example is ,  treefrogs are sometimes eaten by snakes and birds.

Therefore, Natural selection leads to evolution.