4.4 explain the names given to different trophic levels to include producers, primary, secondary and tertiary consumers and decomposers

Producers are the first trophic level because they are at the bottom of the food chain. They turn sunlight into usable energy, in other words, the produce energy.

The second tier are known as the primary consumers, as they are the first consumer in the food chain. They consume the producers.

The third tier are known as secondary consumers as they are the second consumer in the food chain, they consume the primary consumers.

And so on.

NOTE: Eventually all of the above die, they are eaten by decomposers (who break down dead material/waste.