15 Direction. Encircle the letter of the correct answer.
1. Which of the following best explains convection current in the mantle?
a. The driving force due to heat from mantle that facilitates the slow movement of
lithospheric plates.
b. The magnetic force at the poles that moves the lithospheric plates away from
one another.
C. The gravitational force of the moon that pulled the lithospheric plates away from
one another.
d. The force of the atmosphere that pushed the lithospheric plates.