The term for an organism like a green plant that can make its own food is autotroph.

Here's why:

* Autotrophs are organisms that can produce their own food from inorganic sources, using energy from sunlight (photosynthesis) or from chemical reactions (chemosynthesis).

* Green plants are a common example of autotrophs. They use sunlight, carbon dioxide, and water to create sugars (their food) through photosynthesis.

Let me know if you'd like more details about autotrophs or photosynthesis!