Which Koppen climate type is described by the following characteristics?

 I. Average monthly temperature rarely falls below 18°C.

 II. Annual rainfall exceeds 2000 mm, distributed evenly throughout the year.

 III. Humid conditions support dense evergreen forests. 

The description highlights a climate that is consistently hot and wet, which is the hallmark of the equatorial or tropical rainforest region.Criterion I ($> 18$°C): This is the defining temperature threshold for all "A" (Tropical) climates in the Köppen classification. It ensures there is no winter season.Criterion II ($> 2000$ mm, evenly distributed): This is the deciding factor between the tropical subtypes. While Am (Monsoon) and Aw (Savanna) have high annual rainfall, they both have distinct dry seasons. Af maintains high precipitation (at least $60$ mm per month) throughout the year.Criterion III (Evergreen forests): The lack of a dry season allows for the growth of "true" rainforests (selvas) where trees do not need to shed their leaves to conserve water.