Which of the following is an example of a first level consumer?

• A. Producers
• B. Detritivores
• C. Omnivores
• D. Herbivores

Answer: (D)

First level consumer means an organism that eats producers. Herbivores fit this because they feed directly on plants, gaining energy from the producers at the base of the food web. Examples like rabbits or deer eating grass show how energy moves from plants to primary consumers. Detritivores feed on dead organic matter, not living producers, so they aren’t considered first-level consumers. Omnivores eat both plants and animals, so their trophic position can vary and isn’t restricted to the first consumer level. Producers themselves aren’t consumers; they form the base of the energy pyramid.