Multiple choice

Why is America so rich in coal?

  1. peat had time to accumulate & get slowly compacted

  2. igneous rock had time to accumulate & get slowly compacted

  3. limestone had time to accumulate & get slowly compacted

  4. marine animals had time to accumulate & get slowly compacted

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A Correct answer
Explanation

Coal is formed from the remains of ancient swamp plants. Peat is the precursor to coal, which accumulates in oxygen-poor environments and undergoes compaction over geological time.