The tropical rainforest is made up of layers according to the growth of plants. The upper level, the emergent layer, is the point of the tallest trees. The canopy, directly under the emergent layer, are the growing trees and where many animals live. The understory is the top of other bushy plants and shrubs. The forest floor does not get much sunlight so the plants growing there must be able to survive without much sunlight. It is the least crowded layer of the rainforest.