Identify incorrect pair regarding ecology
| I) Tropical rain forests | - Base of mountains |
| II) Niche | - The special position of the food chain |
| III) Biomass | - Living material that can be converted into energy |
| IV) Biological control | - Predator of the parasite of the crop |
1
I, III
2
I, IV
3
II, III
4
II, IV