Final answer:
Sand is the soil component derived from nonliving sources such as rock material, differentiating it from organic components like humus.
Step-by-step explanation:
The soil component derived from nonliving sources such as rock material is sand.
Unlike humus and other organic matter which are composed of decomposing plant and animal matter, sand is part of the inorganic mineral content of soil.
The inorganic materials, such as sand and clay, originate from the weathering of rocks.
Sand particles have a diameter of 0.1 to 2 mm and are a result of the physical and chemical breakdown of rocks over time.