The canopy layer is the uppermost layer of a forest, formed by the tops of trees. It plays a crucial role in the ecosystem by providing habitat for many species, including birds, insects, and mammals. The canopy is typically dense, allowing only a small amount of sunlight to reach the layers below, which helps regulate temperature and moisture in the forest. In tropical rainforests, the canopy can be particularly rich in biodiversity, hosting various plants like vines and epiphytes. This layer is essential for photosynthesis, as it captures sunlight, which is vital for the growth of trees and other vegetation. The canopy also helps in carbon storage, contributing to climate regulation.