Imagine a field of sunflowers; a field of flowers that are pollinated by basically three different pollinators, based on height. Bees are attracted to short plants. Another pollinator, butterflies, prefer plants of medium height and the third pollinator, birds, visits only the tallest plants. Pesticide spraying kills many insect pests in the field of sunflowers but also wipes out the bee and the butterfly populations. Over several generations, only the tall sunflowers remain. What conclusion can be drawn regarding this scenario and natural selection?.