Earth's core acts as a source of heat in the mantle and results in mantle convection.
Answer: Option D
Explanation:
The earth is divided into three layers namely the outer crust, the middle mantle and the inner core. The inner core layer of the earth has very high temperature due to which it is very hot and it acts as source of heat for the middle layer mantle.
Mantle convection is the moderate crawling movement of Earth's strong silicate mantle brought about by convection flows conveying heat from the earth’s core to the earth’s crust. Thus the Earth's core acts as the heat source for mantle.
