Biology STAAR (State of Texas Assessments of Academic Readiness) Practice Test

The term that describes a heterotroph that primarily consumes other animals is "carnivore." Carnivores are organisms that obtain their energy and nutrients by eating other animals. They play a crucial role in the food web as predators, helping to regulate prey populations and maintaining ecological balance. Typically, carnivores have adaptations that aid in hunting and consuming their prey, such as sharp teeth or claws.

In contrast, herbivores primarily consume plants, whereas omnivores eat both plants and animals. Detritivores, on the other hand, feed on decomposing organic matter, such as dead plants and animals, contributing to nutrient cycling in ecosystems. Thus, the defining characteristic of carnivores is their diet mainly consisting of other living animals, which is why this term is the correct choice.