How do plants primarily obtain nutrition?

Plants primarily obtain nutrition through a process known as photosynthesis, which involves absorbing sunlight and converting it into chemical energy. During photosynthesis, plants take in carbon dioxide from the air and water from the soil. Using sunlight as energy, they convert these raw materials into glucose, a type of sugar that serves as food for the plant, as well as releasing oxygen as a byproduct.

While plants do absorb nutrients from the soil, such as nitrogen, phosphorus, and potassium, these nutrients are only part of the overall nutrition process. The critical component of how plants obtain energy is through photosynthesis, which clearly highlights the importance of sunlight in their nutritional process. Therefore, the correct answer emphasizes the combination of sunlight and water as essential for the synthesis of their food, solidifying the understanding of how plants thrive and grow.