An organism that takes in organic molecules and then breaks them down is called a heterotroph.

Here's why:

* Hetero means "other" and troph means "nourishment".

* Heterotrophs cannot produce their own food like plants (autotrophs) do through photosynthesis.

* Instead, they obtain their energy and nutrients by consuming other organisms, whether they are plants, animals, or decaying organic matter.

* The process of breaking down these organic molecules is called cellular respiration, which releases energy for the organism to use.

Examples of heterotrophs:

* Animals

* Fungi

* Bacteria (some types)