How do plants absorb sunlight?

Hint: Let us first understand photosynthesis. Photosynthesis is the conversion of light energy into chemical energy by plants and other creatures, which is subsequently released to power the organism's metabolic activities via cellular respiration. This chemical energy is stored in carbohydrate molecules like sugars and starches, which are made from carbon dioxide and water - hence the name photosynthesis, which is derived from the Greek words phos (light) and synthesis, which means "bringing together."

Complete step-by-step solution:
Chlorophyll, a particular coloured molecule or pigment found in most plants, is employed in photosynthesis. Chlorophyll is the pigment that absorbs solar energy and converts it to chemical energy. Sunlight comes in a variety of colours. In most cases, chlorophyll absorbs red and blue light from the sun while reflecting green light.
Most of the time, oxygen is discharged as a waste product. Plants, algae, and cyanobacteria are examples of photoautotrophs, which perform photosynthesis. Photosynthesis is responsible for producing and maintaining the oxygen content of the Earth's atmosphere, as well as providing the bulk of the energy required for life on the planet.

Note:Although different species undertake photosynthesis in different ways, the process always starts with light energy being absorbed by proteins called reaction centres, which contain green chlorophyll pigments. These proteins are stored in chloroplasts, which are most common in leaf cells in plants, while they are embedded in the plasma membrane in bacteria. Some energy is utilised to strip electrons from appropriate molecules, such as water, in these light-dependent processes, resulting in the production of oxygen gas.