Let's think step by step! Something in the polyp stage can form large colonies in shallow tropical what?
Options:
- (A) mountains
- (B) ice
- (C) porous
- (D) CO 2
- (E) complex
- (F) colonies
- (G) wetland
- (H) water
The thinking starts now:
Corals form large colonies in shallow tropical water. Corals Corals are in the polyp stage. Something in the polyp stage can form large colonies in shallow tropical water. The final answer: (H).