Answer:
Natural selection
Explanation:
Natural selection from the given option best describes the process the pest population has experienced due to changes in the environment.
The precepts of evolution which causes changes within and between population of organisms is hinged on the natural selection.
Natural selection suggests that evolution is driven by favorable traits developed by organisms in order to adapt to the environment.
With changes in the environment, we can be sure that the pest population would have adapted through the means of natural selection. This way, organisms with desired traits and attributes prevails over others.
