Well do you know the definition of prehistory? you should look up the meaning of both words and compare and contrast them
Explanation:
after earth cooled down from being a large ball of molten lava , the water vapour in gaseous state turned into liquid and it poured rain for thousands of years filling all the oceans we see now and as the rocks were filled with salts and minerals the ocean became salty
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Answer:
A. Volcanic activity
Explanation:
The volcanic activity is the process that creates the new minerals on the planet. In this process, the magma from the mantle rises toward the surface. Some magma solidifies inside the crust, while some on the surface, though then its called lava. Be it inside the crust, or on the surface, it is always a large amount of magma or lava that comes to a certain area, causing the formation of certain minerals, and they are in high concentration. The magma and the lava manage to cover large areas, either pushing aside old rocks, or covering them with thick layers, thus resulting in monotonous high concentrated certain types of minerals in some areas.