The escape velocity of the Earth is 11.2 km/sec, corresponding to option [D]. Escape velocity is the minimum speed required for an object to overcome the gravitational pull of a celestial body and venture into space without falling back. For Earth, this velocity is approximately 11.2 km/sec at the surface. Objects traveling at or above this speed can break free from Earth’s gravitational field and continue moving away into space indefinitely, assuming no other forces act upon them. The concept of escape velocity is crucial for space exploration, satellite launches, and understanding the dynamics of celestial bodies. It represents the boundary between orbits where objects remain in Earth’s gravitational influence and those where they can escape into interplanetary or interstellar space.