Claim: The bottom layer of the Amazon rainforest is the emergent (or dominants) where the tallest trees are found; then the primary layer is the canopy, where about 70 to 90 percent of all rainforest life resides.
Evidence: The Amazon rainforest has four layers, each of which has its own unique ecosystem. The top layer is the emergent (or dominants) where the tallest trees are found (up to 200 feet tall).