Due to internal heat of the earth, the currents of the semi-molten rocks begin to move towards the crust and tear it apart dividing it into large fragments called lithospheric or tectonic plates. There are seven such major plates namely, South America, North America, Pacific, Indo–Australian, Eurasian, African and Antarctic.

For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/