Primary consumers are best described as which of the following?

• A. Animals that eat primary producers; also known as herbivores.
• B. They are carnivores that feed on other animals.
• C. They decompose organic matter.
• D. They are producers that perform photosynthesis.

Answer: (A)

In ecosystems, energy moves from producers, which capture sunlight, to the organisms that eat them. Primary consumers are the first feeders on producers, so they are herbivores that eat plants. This makes them the direct link between photosynthesizing producers and higher trophic levels. The other descriptions don’t fit: carnivores eat other animals, decomposers break down dead matter, and producers themselves perform photosynthesis rather than consuming others.