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Which statement about Earth’s mantle is correct? (GIVING BRAINLIEST TO CORRECT ANSWER!)

1.) The density of the mantle is greatest 300 km below the Earth’s surface

2.) The highest temperatures within the Earth occur in the mantle.

3.) The greatest pressures within the Earth exist in the mantle.

4.) The temperatures of the mantle 300 km below the Earths surface is very near its melting point.