Can someone help me?? Which action is a result of gravity in relation to moving tectonic plates?

Earth's internal heating

circulating material in the mantle

ridge push and slab pull

Earth's magnetic field reverses

B. ridge push and slab pull

Explanation: Took the test.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.