The structure used by plants to make food in a process called photosynthesis is called a chloroplast.

Here's a breakdown:

* Chloroplasts are organelles found within plant cells. They contain the green pigment chlorophyll, which absorbs sunlight.

* Photosynthesis is the process where plants use sunlight, water, and carbon dioxide to create their own food (glucose) and release oxygen as a byproduct.

* Chloroplasts are the sites where photosynthesis takes place. They have a complex internal structure that includes:

* Thylakoids: Membranous sacs that contain chlorophyll and other pigments.

* Grana: Stacks of thylakoids.

* Stroma: The fluid-filled space surrounding the thylakoids, where the carbon dioxide fixation reaction occurs.

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