Which one of the following ecosystem types has the highest annual net primary productivity?

Step-by-step solution

Productivity of tropical rainforests is the highest. The tropical rainforests coveringan area of 3,00,000 ~km ^2 contain more than 50 % of the total flora and fauna of the world. They are found in the equatorial regions rainfall exceeds 140 ~cm . The warm humid climate supports broad leaved evergreen plants. Productivity is very high and the vegetation show stratification into two or more well defined layers.