Which statement best describes a complete fertilizer?

• A. It provides nitrogen, phosphorus, and potassium, plus micronutrients.
• B. It contains only nitrogen.
• C. It contains only phosphorus.
• D. It contains only potassium.

Answer: (A)

A complete fertilizer is defined by providing all three primary plant nutrients—nitrogen, phosphorus, and potassium—in one product. Nitrogen supports foliage growth, phosphorus helps with root development and flowering, and potassium aids overall plant vigor and stress tolerance. The statement that includes nitrogen, phosphorus, and potassium—and often micronutrients—best matches this idea, since it describes having the three major nutrients and acknowledges that trace elements are commonly included as well. The other options describe products that contain only a single nutrient, which would not supply the full balance plants need.