Which of the following ecosystem types has the highest annual net primary productivity?
(a) Tropical rain forest
(b) Tropical deciduous forest
(c) Temperate evergreen forest
(d) Temperate deciduous forest
Correct option (a) Tropical rain forest
Productivity of tropical rain forest is highest. The tropical rain forest cover 300,000 km2 area. They contain more than 50% of total flora and fauna of the world.