Here's why:
* Sunlight: Photosynthesis begins with sunlight. Plants capture light energy from the sun using chlorophyll, a green pigment found in their leaves.
* Conversion to Chemical Energy: This light energy is used to convert carbon dioxide (CO2) and water (H2O) into glucose (a simple sugar) and oxygen (O2).
* Stored Energy: The glucose molecule stores the energy captured from sunlight in its chemical bonds. This stored energy can later be released by plants and other organisms through cellular respiration.
In essence, photosynthesis takes light energy from the sun and transforms it into chemical energy stored within the bonds of sugar molecules.
