Which of the following are components of soil?

The correct answer is the one that encompasses all the fundamental elements that make up soil. Soil is a complex mixture consisting of four primary components: organics, inorganics, air, and water. Organics refer to decomposed plant and animal matter, contributing to soil fertility and structure. Inorganics typically include minerals and nutrients essential for plant growth. Air in the soil space provides oxygen necessary for the survival of soil organisms and plant roots, while water is vital for biochemical processes and nutrient transport.

This comprehensive understanding of soil's composition is crucial for effective land management, agriculture, and environmental conservation. The other options are limited in scope and do not account for the full range of materials that contribute to the soil ecosystem, making them inadequate representations of what components are actually present in soil.