Organisms that obtain energy by feeding on other organisms are called heterotrophs.

Here's a breakdown:

* Heterotrophs are organisms that cannot produce their own food (like plants do through photosynthesis).

* They must consume other organisms (plants, animals, fungi, bacteria) to obtain the energy and nutrients they need to survive.

Examples of heterotrophs include:

* Animals: Lions, birds, fish, insects, etc.

* Fungi: Mushrooms, yeasts, molds

* Bacteria: Many types of bacteria are heterotrophic.

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