What is the source of food for heterotrophs?

Heterotrophs obtain their energy and nutrients by consuming other organisms, whether it be plant or animal matter. For example, herbivores are heterotrophs that feed only on plants, while carnivores are heterotrophs that feed only on animals. Omnivores are heterotrophs that feed on both plant and animal matter.

During the process of respiration, heterotrophs break down the complex organic molecules that are obtained from their food to release energy in the form of ATP. They also release carbon dioxide as a waste product.

Therefore, heterotrophs obtain their food from both plants and animals.