Answer:
The correct order of the rainforest layers from top to bottom is option 2: canopy, emergent layer, understory, forest floor.
Step-by-step explanation:
The canopy is the top layer of the rainforest, followed by the emergent layer, which is composed of the tallest trees. The understory layer is below the emergent layer and the canopy layer, and it consists of shorter trees, shrubs, and young trees. The forest floor is the bottom layer, which is made up of decaying organic matter, soil, and the roots of plants.