The structures in plants that capture sunlight and convert it to energy are called chloroplasts.

Here's how it works:

* Chloroplasts are tiny organelles found within the cells of plants and some algae.

* They contain a green pigment called chlorophyll, which absorbs light energy, primarily in the red and blue wavelengths of the visible spectrum.

* This light energy is used to power a series of chemical reactions called photosynthesis.

* Photosynthesis uses water and carbon dioxide to produce glucose (a sugar), which provides energy for the plant, and releases oxygen as a byproduct.

So, in essence, chloroplasts are like tiny solar panels within plant cells, capturing sunlight and transforming it into chemical energy that fuels the plant's growth and development.