The document describes the four layers of the rainforest: the forest floor, understory, canopy, and emergent layer. The forest floor receives nutrients from rotting plants and animals. The understory provides shelter and absorbs sunlight. The canopy layer blocks 80% of sunlight and is home to air plants and animals like lions, toucans, and sloths. The emergent layer is the tallest part of the rainforest, reaching up to 250 feet, and provides shelter for birds and insects living in trees like the Kapok tree.