Which step only occurs in the formation of coal? a. movement of the earth causes the rock to fold and form a trapb. decaying swamps are covered with seawaterc. great temperatures build up over layers of organic materiald. organic remains are trapped under layers of sediment and water

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What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

What type of pollution does household garbage cause