what does horizon mean in science?

Question

Please choose the description that describes horizon properly.......

1. A very young mountain range, as noted by sharp peaks and little vegetation.
2. Resolves the problems of topsoil loss due to wind erosion and the removal of soil nutrients when the whole crop is removed from the soil.
3. To break up compacted soil with a plough in order to allow water and air into the soil in preparation for planting.
4. A soil component that consists of the largest particles of rock.
5. In order to reduce erosion due to wind, farmers plant trees next to their farms and between their fields.

Answer 1

As per the previous answer but it's not a component that consists of the largest particles of rock.

Soil and subsoil is made up of many layers, horizon is just one of those layers but it can be made up of anything (silt, sand, clay, rocks etc)

Answer 2

id say neither for i say horizon is the place where things resides at the x axis

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