The answer is; a) they are naturally occurring.
Answer:
Mineral resources are a concentration of minerals in Earth's crust that can be extracted and processed now or in the future, and including unidentified sources. Mineral reserves are those that are identified and can be mined profitably under current economic conditions with current technology. Both are potentially valuable, and for which reasonable prospects exist for eventual economic extraction
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Answer:
Sedimentation.
Explanation:
The process that is responsible for the movement of carbon atoms from the biosphere to the geosphere is called sedimentation. Carbon enters the geosphere or lithosphere through the biosphere when dead organic matter becomes incorporated into the soil that turns the shells of calcium carbonate to become limestone through the process which is called sedimentation. This sedimentation process is very necessary for the formation of different types of minerals such as limestone, fossil fuels etc.
Answer:
the structure by which the embryo is called the oblica cord
