Which of the following is NOT one of the five soil components?

The five soil components essential to its structure and function are mineral matter, organic matter, water, air, and living organisms. Mineral matter refers to the inorganic materials that make up the bulk of soil, providing essential nutrients and stability. Organic matter includes decomposed plant and animal material, which enriches the soil with nutrients and helps retain moisture. Water is vital for the chemical and biological processes occurring within the soil, while air is necessary for the respiration of roots and soil organisms.

Pollutants, while they can be present in soil and affect its health and function, do not constitute a natural component of soil. Instead, they represent contaminants that can degrade soil quality and lead to adverse environmental impacts. Thus, they do not belong in the list of primary soil components that define its natural composition and health. Recognizing this distinction helps in understanding not only the fundamental aspects of soil but also the impact of human activities on its quality.