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Answer:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. ... Accretion occurs as mantle is added to the growing edges of a plate, associated with seafloor spreading

Explanation:

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Answer:

A fireplace burns wood and the fire goes up out of the chimney. The fire going up heats the house without endangering it with being burned. :)