How is soil structure defined?

Soil structure is defined as the arrangement of soil particles into aggregates or clumps. This structure influences various soil properties, such as porosity, permeability, and erosion potential. The way soil particles are organized affects water movement, root growth, and the overall health of the soil ecosystem. Good soil structure can improve aeration, enhance water infiltration, and increase the soil's ability to hold nutrients and support plant growth.

The other options refer to different aspects of soil. The arrangement of soil organisms relates to the biological components of soil rather than the physical arrangement of soil particles. The composition of soil minerals pertains to the specific minerals present in the soil rather than how they are structured. The depth of the soil profile describes the vertical extent of the soil layers, but it does not address the arrangement of particles within those layers. Therefore, the arrangement of soil particles accurately captures the concept of soil structure.