Discuss how the changes in shape and sizes of continents and ocean basins of the planet take place due to tectonic movements of the crustal masses. (Answer in 250 words)

- Discuss how the changes in shape and sizes of continents and ocean basins of the planet take place due to tectonic movements of the crustal masses. (Answer in 250 words)
Introduction
The Earth’s lithosphere is divided into several tectonic plates that float over the semi-molten asthenosphere. Their constant movement leads to gradual reconfiguration of continents and ocean basins, shaping Earth’s geological history and surface features.
Body
1. Continental Drift and Plate Tectonics: Alfred Wegener’s Continental Drift Theory proposed that all landmasses were once part of a single supercontinent, Pangaea, which later drifted apart. The modern Plate Tectonic Theory explains this movement through divergent, convergent, and transform plate boundaries.
2. Formation and Expansion of Ocean Basins: At divergent boundaries, such as the Mid-Atlantic Ridge, new crust forms through sea-floor spreading, widening ocean basins (e.g., Atlantic Ocean expanding).
3. Shrinking and Destruction of Basins: At convergent boundaries, oceanic plates subduct beneath continental or oceanic plates, causing trench formation and basin contraction, as seen in the Pacific Ocean.
4. Mountain Building and Continental Growth: When continental plates collide (e.g., Indian and Eurasian plates), they create fold mountains like the Himalayas, altering continental shapes and elevation.
5. Rift Formation and Continental Fragmentation: Rifting zones such as the East African Rift Valley indicate early stages of new ocean basin formation as continental crust splits apart.
Conclusion
Thus, the tectonic movement of crustal plates continuously reshapes Earth’s continents and oceans—expanding, colliding, and fragmenting them—making the planet’s surface a dynamic and ever-evolving geological system.