Heat from earth's interior causes convection currents in earth's

The convection currents would come from the exterior core and they would travel through the mantle and eventually through the core

Heat from the earth's interior causes convection currents in the earth's mantle

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.

The statement that best describes the object on the right is a bar magnet with its north pole on the left.