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its i think c because its the lowering cloud

all fossil fuels are nonrenewable, so think coal, gasoline, things that we will eventually run out of. all fossil fuels are nonrenewable resources, but not all nonrenewable recourses are fossil fuels. these resources are not being renewed as fast as we are using them. i hope this considering there weren't any answer choices.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.