Definition of photosynthesis: Photosynthesis is the process by which green plants, algae, and
some bacteria convert light energy into chemical energy, allowing them to produce their own
food. It takes place mainly in the chloroplasts of plant cells, where a pigment called chlorophyll
absorbs sunlight. Using this energy, the plant combines carbon dioxide from the air with water
from the soil to create glucose, a type of sugar that serves as fuel for growth and metabolism. As
a byproduct, oxygen is released into the atmosphere, which is essential for most living organisms
on Earth. This process not only sustains the plant itself but also forms the foundation of nearly all
food chains, making it crucial for life on our planet.