Answer:
internally digested foods
Step-by-step explanation:
I assumed you wanted to write 'what distinguishes animal heterotrophy from fungal heterotrophy is that animals derive their nutrients from?'
Animal and fungi are both heterotrophic in that they have no ability to manufacture their foods unlike plants that can do so by photosynthesis. Their nutrition is dependent on external source of foods.
Animals feed by ingesting their foods. Digestion of the food takes place in an inner cavity and undigested foods/excretory materials are egested from the body through an opening.
Fungi, on other hand do not ingest their foods. Instead, they secret substance on their foods which digest the foods externally before absorbing the digested food into their bodies.
Hence, what distinguishes animal heterotophy from fungal heterotrophy is that animals derive their nutrient from internally digested foods.