This system focuses on how the think being studied interacts with the other constituents of the system. Insects damaging the crops seem to be the big issues to the crops agriculture. By spraying pesticide intended to solve the problem actually make it worse because the way its unintended side effects change the system end up exacerbating the problem. Pesticide might slow down the growth of insect type “A” but eventually lead to greater number of insect type “B” because insect type “A” is no longer controlling the numbers of insect “B” to the same extent. My solution is to spray pesticide intended for insect type “A” on the first crop season and then on the following season, we’ll spray pesticide intended for insect type “B”. In this case we will eliminate both types of insect. Then again, how would pesticide affect the water and soil and the environment.