Formation of tropical forests needs mean annual temperature and mean annual precipitation as:
a. 18 – 25°C and 150 – 400 cm
b. 5 – 15°C and 50 – 100 cm
c. 30 – 50°C and 100 – 150 cm
d. 5 – 15°C and 100 – 200 cm
The formation of tropical forests needs a mean annual temperature of 18–20? C and a mean annual precipitation of 150 – 200 cm. Hence, the answer is option (a).