volcanoes are a remarkable source of heat caused by the constant cycle of magma rising and sinking in earths mantle, where heat is transferred through the movement of atoms from bottom to top. scientists have conducted studies on the flow of magma rising to the surface, cooling, and then sinking. one such study was conducted on mount tambora, a volcano in indonesia. for several thousand years before the eruption, pyroclastic rocks had been forming, which indicated a very high heat energy build-up causing molten rock to continuously shift. as the magma heats, it becomes less dense and rises to the surface until it eventually erupts and is released as lava. during the eruption, large amounts of gases, liquid lava, and solid particles are discharged from earths mantle into the atmosphere. the temperature surrounding the volcano is very high, making it fatal. as the lava comes in contact with the ground, heat transfers from hot to cold, causing the hot lava to cool down and solidify. witnesses of the eruption observed three pillars of fire, which appeared to have glowing ash and rocks.
Volcanic eruptions occur due to convection. Which portion of the passage 1 point BEST explains how convection is occurring in the MANTLE?
A. Volcanoes are a remarkable source of heat caused by the constant cycle of magma rising and sinking in Earth's mantle, where heat is transferred through the movement of atoms from bottom to top.
B. For several thousand years before the eruption, pyroclastic rocks had been forming, which indicated a very high heat energy build-up causing molten rock to continuously shift.
C. As the magma heats, it becomes less dense and rises to the surface until it eventually erupts and is released as lava.
D. As the lava comes in contact with the ground, heat transfers from hot to cold, causing the hot lava to cool down and solidify.
