Final answer:
The correct order of soil horizons starting at the surface is: b) O, A, B, C, E.
Step-by-step explanation:
Soil horizons are classified based on their composition, texture, and structure, with each layer indicating different properties. The correct sequence starts with the O horizon, composed of organic matter like decomposed leaves, followed by the A horizon (topsoil) rich in minerals and organic material. Below that lies the B horizon (subsoil), containing minerals leached from the layers above. The C horizon comprises partially broken-down rock material, and finally, the E horizon shows signs of and leaching.
Beginning with the O horizon, which represents the top layer of organic matter, the sequence progresses downward through distinct layers, showcasing variations in mineral content, organic material, and other soil characteristics. This systematic arrangement illustrates the formation and composition of soils in a vertical profile.
Correct answer: b) O, A, B, C, E