What are the distinct geographical zones that define the vertical structure of the Amazon Rainforest ecosystem?

The rainforest is divided into four distinct layers: The Emergent Layer (towering giants receiving extreme sun), the Canopy (a dense green roof housing 80% of all animal species), the Understory (dark, humid, adapted for low-light plants and ambush predators), and the Forest Floor (pitch black, dominated by rapid fungal decomposition).