The primary plant in a rain forest is the hardwood tree, particularly species like mahogany and teak. These trees dominate the canopy layer and can grow very tall, creating a unique habitat that supports diverse wildlife. Rain forests are characterized by their high rainfall, humidity, and warmth, contributing to the rapid growth of these trees. They play a critical role in the ecosystem by providing oxygen, acting as carbon sinks, and maintaining the global water cycle. The complex structure of rain forest trees also fosters a variety of life forms while protecting young saplings underneath their vast canopies.