In the worksheet for Some Animals Are More Equal Than Others: Trophic Cascades and Keystone Species, you are given data about Letourneau and Dyer's study from the 1990s. They studied the impact of beetles on ants that live on a tropical shrub.Which statement do Letourneau and Dyer's results support?group of answer choices O adding beetles reduced ant numbers and increased the caterpillar population size, proving that the caterpillars are a keystone species in this habitat. O adding beetles had little effect on this ecosystem, showing that it is primarily regulated from the bottom up. O adding beetles reduced ant numbers and triggered a trophic cascade that increased the mean leaf area left on plants. O adding beetles reduced ant numbers and triggered a trophic cascade that decreased the mean leaf area left on plants.