Please choose the correct answer to the question: Coal is solid rock that began as organic material that was deposited in a swamp. The formation of coal suggests that

Answer1: coal is made mostly of skeletal remains of animals. Answer2: coal is formed from magma that has solidified over time. Answer3: it quickly becomes petrified when water is removed. Answer4: geologic processes continue over millions of years.

Answer format: answer1/answer2/answer3/answer4