Answer:
Celestial equator.
Explanation:
The celestial equator is a strand of the celestial sphere that is essentially expanding the Earth's equater out of the celestial sphere.
In summary, the celestial equator is an extensive circle resulting from the intersection of the celestial sphere with the plane that is perpendicular to the terrestrial axis in the center of the earth. We can define it as a projection from the equator to space.
Mantle convection is an important method of heat transport within the Earth. Mantle convection is the driving mechanism for plate tectonics, which is the process ultimately responsible for producing earthquakes, mountain ranges, and volcanos on Earth.
In my opinion, the correct answer among the choices listed above is option D. Hydrogenous sediment is made up of minerals that crystallize directly from ocean waters. They are produced when minerals reacts chemically with seawater.
