What is it called when living things cannot make their own food?

Heterotrophs are living things that cannot make their own food. Instead, they obtain energy by consuming other organisms or organic matter. Heterotrophs include animals, fungi, and many bacteria.

In contrast, autotrophs are living things that can make their own food. Autotrophs include plants, algae, and some bacteria. They use energy from the sun or inorganic chemicals to convert carbon dioxide and water into organic molecules, such as glucose.