Question

Assertion (A): Most volcanic eruptions take place near plate margins.

Reason (R): When these plates slide past each other or collide against each other due to intense heat inside the earth’s core, their edges produce faults along the lines of weakness.

Options

• Both A and R are true, and R is the correct explanation of A.

• Both A and Rare true, but R does not explain A.

• A is true, but R is false.

• A is false, but R is true.

Answer 1

Both A and R are true, and R is the correct explanation of A.

Explanation:

Most volcanic eruptions take place near plate margins because the movement of the Earth’s plates creates lines of weakness in the crust. When these plates slide past each other, move apart, or collide due to intense heat and pressure from inside the Earth’s core, their edges often fracture and produce faults. These faults act as pathways for molten magma to rise from beneath the surface. As magma pushes through these cracks, it can erupt onto the Earth’s surface as lava, forming volcanoes. Thus, the process of plate movement and fault formation directly explains why volcanic activity is concentrated along plate boundaries.