Here's why:
* High levels of sunlight: Rainforests receive abundant sunlight year-round, fueling photosynthesis.
* Consistent warmth: Warm temperatures optimize conditions for plant growth.
* High rainfall: Ample rainfall provides water for plant growth and supports a diverse array of organisms.
* Rich biodiversity: The vast diversity of plants and animals in rainforests creates complex food webs and efficient nutrient cycling.
While other biomes like coral reefs and estuaries are also highly productive, rainforests consistently rank as the most productive biome on Earth.