The specialized structure in a plant that makes its own food is called a chloroplast.

Here's why:

* Photosynthesis: Chloroplasts are the sites of photosynthesis, the process where plants use sunlight, water, and carbon dioxide to produce glucose (sugar) for energy and oxygen as a byproduct.

* Chlorophyll: Chloroplasts contain a green pigment called chlorophyll, which captures light energy.

* Organelles: Chloroplasts are organelles, meaning they are tiny structures within plant cells that have specific functions.

Let me know if you'd like to know more about how chloroplasts work!