What is the primary purpose of photosynthesis in plants?

The primary purpose of photosynthesis in plants is to capture energy from sunlight. During this process, plants utilize sunlight to convert carbon dioxide from the air and water from the soil into glucose and oxygen. The glucose serves as an energy source for the plant, supporting its growth and development. Capturing solar energy is fundamental to the survival of plants, as they are autotrophs that rely on this process to produce their own food.

While the other options may touch upon aspects related to plants, they do not accurately reflect the core function of photosynthesis. Waste products are not the primary focus of this process; rather, oxygen produced can be seen as a byproduct. Soil erosion and the absorption of pollutants relate more to environmental interactions and the role of plants in ecosystems but are not direct purposes of photosynthesis itself. Thus, the role of capturing energy from sunlight stands out as the essential function that underpins the entire process.