An organism that eats other organisms to survive is called a heterotroph.

Here's a breakdown:

* Hetero means "other"

* Troph means "nourishment"

So, a heterotroph gets its nourishment from other organisms.

There are many different types of heterotrophs, including:

* Herbivores: Eat only plants

* Carnivores: Eat only animals

* Omnivores: Eat both plants and animals

* Decomposers: Break down dead organisms

Let me know if you have any other questions!