______ always occupy the first level of a food chain.
Choose the correct one from the following statements
1. Each organism occupies one trophic level in a food chain.
2. A trophic level in a food chain may be occupied by any of the producers, herbivores, carnivores or decomposers
3. Top consumers in a food chain generally feed on secondary consumers.
4. GFC and DFC are the common food chains and the latter is having maximum energy than the first