Question

According to the ‘Theory of Plate Tectonics’, when some plates come towards each other, which of the following is formed?
A) Convergent boundary
B) Divergent boundary
C) Transform boundary
D) Colliding boundary

Answer 1

Hint: The lithosphere, the Earth's solid outer crust, is divided into plates that move across the asthenosphere, the molten upper layer of the mantle, according to plate tectonics theory. All around the world, oceanic and continental plates collide, spread apart, and interact at their boundaries.

Complete answer:
Convergent boundary states that two plates are moving toward each other at a tectonic border. When the density of the two plates is equivalent, they normally push up against one other, forming a mountain chain. In a subduction zone, one plate dips beneath the other if its densities are uneven.

Convergent boundaries, also known as destructive boundaries, are areas when two or more plates are moving in the same direction. Depending on the density of the participating plates, convergent boundary movement is classified as subduction or collision. The continental lithosphere has a lower density than the underlying asthenosphere, making it more buoyant. Oceanic lithosphere is denser than continental lithosphere, and it can even be denser than the asthenosphere when old and cold.

As Earth's crust is crushed and pushed upward, convergent plate boundaries, such as the one between the Indian Plate and the Eurasian Plate, generate towering mountain ranges like the Himalayas. A convergent plate boundary, on the other hand, can sometimes result in one tectonic plate sinking beneath another.

Hence, the correct option is ‘A’ i.e, convergent boundary.

Note: A convergent plate boundary is formed when two tectonic plates clash. Subduction is a process in which one of the converging plates moves beneath the other. Deep trenches are common structures generated when tectonic plates are subducted and earthquakes occur often.