Continents have drifted apart because of-

Correct answer: (b) Tectonic activities

Explanation

Plate tectonic activity is considered the most appropriate reason for the separation of continents. The upper part of the Earth (the entire crust and the upper mantle) is made up of different plates. These plates become mobile in various patterns due to tectonic processes. Thus, these plates shift the continents and oceanic regions lying on them along with their own movement.