Here's why:

* Electromagnetic energy: Sunlight is a form of electromagnetic radiation, specifically within the visible light spectrum.

* Chemical energy: Plants convert this light energy into chemical energy stored within the bonds of glucose (sugar) molecules.

* Photosynthesis: The process of capturing light energy and using it to create glucose is called photosynthesis.

So, plants essentially "trap" sunlight and use its energy to build sugars for their own energy needs.