Answer:
Natural Selection, Genetic Drift, Mutations and Gene Flow.
Explanation:
One problem with pesticide application is that if they use spray, it leaves a residue, so if a child or animal were to get in contact with the pesticide and accidentally ingest it, it could injure them.
Phase 1: Starts with the separation between populations. Separated populations become adapted to local conditions and become genetically differentiated over time.
Phase 2: Genetic isolation is completed, reproductive isolation develops mostly in the forms of prezygotic RIMs.
