Green plants always occupy the _______ trophic level.
first
The term 'trophic level' indicates the position of an organism in a food chain. Since the food chain starts with plants, they represent the first trophic level. The herbivores that derive food directly from the plants are included in the second trophic level. Carnivores that depend on herbivores for food are included in the third trophic level. The predators that prey on carnivores represent the fourth trophic level.