What level consumer is an organism that eats only plants?
A first level consumer eats only plants: first level consumer occupies second trophic level of ecological food pyramid.
First level consumers are also called herbivores. These animals eat only plants (i.e. producers).
Second level consumers eat first level consumers. These animals generally only eat animals. Second level consumers are also called carnivores, or predators.
We also name herbivores as "primary consumers"
Herbivores are also named as "Primary consumers".