Identify the correct pair from the given options:

The producers (green plants) are at the first trophic level that fixes up the solar energy and makes it available for consumers. The primary consumers (e.g. insects, goat, etc.) form the second trophic level, the secondary consumers (e.g. fish, frog, tiger, etc.)  third trophic level, and the tertiary consumers (e.g. crane, vulture, tiger, etc.) form the fourth trophic level of the food chain.