The percentage of the increase of iron is 50% because it increased by 0.6 and that's 50% of 1.2mg
Layers of the soil are called horizons. Here are the horizons:
- Humus
- Topsoil
- Subsoil
- Fragmented rock
- Bedrock
Once a soil has developed, it forms layers called horizons. Beneath a surface layer of a plant remains, the topsoil is rich in decomposed plants and animal matter. The subsoil is mainly mineral particles, with much less organic material. The fragmented rock/bedrock is primarily small stones, and beneath it lies all bedrock.
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<span>between the Tigris and Euphrates rivers.......</span>
Answer:
Answer is C.East china sea.
Explanation:
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