What is the primary function of photosynthesis in plants?

The primary function of photosynthesis in plants is the creation of glucose and oxygen. During this process, plants use sunlight, water, and carbon dioxide to produce glucose, which serves as energy for growth and development. The byproduct of photosynthesis is oxygen, which is released into the atmosphere, playing a crucial role in sustaining life for many organisms, including humans. This process occurs primarily in the chloroplasts of plant cells, where chlorophyll captures sunlight.

The other options do not reflect the main purpose of photosynthesis. While photosynthesis does involve light energy, it is transformed into chemical energy (not thermal energy) stored in glucose, and minerals are absorbed from soil through roots but are not a product of photosynthesis. Conversely, carbon dioxide is a reactant in the photosynthetic process rather than a product. Understanding the correct function of photosynthesis highlights its importance in ecosystems, not only for energy production in plants but also as a foundational process that supports life on Earth.