Answer:
B. Warm temperatures year-round and lots of precipitation.
Step-by-step explanation:
The primary requirement for a climate to be classified as tropical is for it to have a temperature of at least 18°C every month of the year.
Because of the high sun angles on the equator and the almost non-existent seasonal variation, tropical climates usually maintain constant temperatures year round except in the case of tropical climates with a distinct dry season.
While not all climates found in the tropical latitudes are classified as such, these are exclusively found in high altitude areas.