Wetlands are extremely important 
Options:
- (A) water conservation
- (B) global ecosystems
- (C) Desert Ecosystem
- (D) Terrestrial ecosystems
- (E) important habitats
- (F) the environment
- (G) food and shelter
- (H) Forest Ecosystems Let's solve this problem gradually.

Wetlands are extremely important biomes. Biomes are global ecosystems. Wetlands are extremely important global ecosystems. So the final answer is (B).