Answer:
Option (D)
Step-by-step explanation:
The earth's core is extremely hot due to which the outer core is liquid in nature and it plays the most significant role in the plate tectonic movement, where the convection cells are formed in the mantle that drives the plates to move over the less dense layer of the asthenosphere.
The scenario would have completely changed if there were no heat energy trapped in the core of the earth. In absence of this heat source, the rocks that are present in both the outer core and asthenosphere would have been entirely solid in nature. The convection current also would have not formed in the mantle and the plates would have remained stationary.
Thus, the correct answer is option (D).