During Paleozoic time period most of the coal under earth’s surface begin to form.
What is the significance of Paleozoic period?
The Paleozoic Era, also spelled Paleozoic, a major interval of geologic time that began 541 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and the greatest extinction event in Earth history is recalled during this particular period of time. It was a time of great change on Earth. The era began with the breakup of one super continent and the formation of another. Plants became widespread and the first vertebrate animals colonized land.
Therefore, (C) option is the correct answer.
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