Here's why:

* High Temperatures: Tropical rainforests are located near the equator, where temperatures are consistently high year-round.

* Abundant Rainfall: These forests receive a minimum of 60 inches of rainfall per year, often distributed evenly throughout the year. This constant moisture is crucial for the growth of dense vegetation.

* High Humidity: The warm temperatures and heavy rainfall lead to high humidity levels, which further support the lush vegetation.

In summary, the combination of high temperatures, abundant rainfall, and high humidity create the perfect conditions for tropical rainforests to thrive.