An organism like a green plant that can make its own food is called an autotroph.

Here's why:

* Autotrophs are organisms that can produce their own food from inorganic sources, such as sunlight, carbon dioxide, and water. They do this through a process called photosynthesis.

* Green plants are a prime example of autotrophs. They use chlorophyll (the pigment that gives them their green color) to capture sunlight and convert it into chemical energy in the form of glucose (sugar).

Other examples of autotrophs include:

* Algae

* Cyanobacteria

* Some bacteria

Let me know if you have any other questions!