Concept:Köppen’s climate classification uses letter codes, where
AF stands for a tropical rainforest climate, also called equatorial climate.
Explanation:Köppen divides climates into five main groups: tropical, dry, mild, continental, and polar.
Each group is further split into specific climate types using letter codes.
The code
AF refers to the tropical rainforest climate, which is always hot and wet throughout the year.
Tropical rainforest climate is commonly known as equatorial climate.
Thus, from the given options, AF matches equatorial climate.
Answer:C. equatorial