select the correct answer. what causes magma in the lower mantle of earth to rise up toward the crust? a…

select the correct answer. what causes magma in the lower mantle of earth to rise up toward the crust? a. the moons gravitational force acts on the magma. b. the core of earth expands. c. the density of the magma decreases. d. the volume of the magma decreases.

select the correct answer. what causes magma in the lower mantle of earth to rise up toward the crust? a. the moons gravitational force acts on the magma. b. the core of earth expands. c. the density of the magma decreases. d. the volume of the magma decreases.

Answer

Brief Explanations:

Magma rises because it becomes less dense than the surrounding rock. When the density of magma decreases, it is buoyant and moves upward towards the crust. The moon's gravitational force mainly affects tides on Earth's surface - not magma movement from the lower mantle. The Earth's core does not expand in a way that causes magma to rise, and a decrease in magma volume would not cause it to rise.

Answer:

C. The density of the magma decreases.