Which best describes the process that the pest population has experienced due to this environmental change?

genetic diversity

natural selection

natural resistance

genetic resistance

The pest population is developing genetic resistance to the environmental changes. Pests are evolving resistance to our pesticides at a fast rate. Insects eat our crops so we spray with pesticides. The pesticides kill the majority of pests, but a few survive. These breed with each other and so propagate a version of pest that is resistant to that particular pesticide. We then change our pesticide and the cycle continues. The end result is a "superbug" that is resistant to all currently used pesticides