A terrestrial biome characterized by dense forests is called a tropical rainforest. These biomes are typically found near the equator, where the climate is warm and humid throughout the year. They boast a high level of biodiversity, housing a vast number of plant and animal species. The primary feature of tropical rainforests is their multi-layered structure, which includes emergent trees, the canopy, understory, and forest floor. These ecosystems play a critical role in global carbon cycling and serve as important sources of medicinal resources.