Question

Organisms that CAN’T photosynthesize and must get their energy by

eating other organisms are called

Answer 1

They are called consumers, primary-consumers/herbivores eat plants
Secondary or higher consumers are carnivorous organisms who eat other animals/fungi

You could also called them animals or fungi, as both cannot photosynthesize.

Hope this helps!

Answer 2

they are called as consumers & in particular if the eat others then carnivorous.