Concept:The soil profile describes the vertical arrangement of soil from the surface down to the parent rock.
Explanation:A vertical cut through the soil exposes a series of distinct horizontal layers.
These horizontal layers are known as soil horizons.
Each horizon differs from the others in colour, texture, structure, and organic matter content.
The entire vertical section, showing all these horizons arranged one above the other, is called the soil profile.
In contrast, soil texture refers to the proportion of sand, silt, and clay particles.
Soil type is a broader classification based on texture or other properties, not a vertical section.
Soil layers are simply the individual horizontal bands, not the whole vertical view.
Therefore, the vertical section of the soil showing the series of horizontal layers is correctly called the soil profile.
Answer:C. Soil profile