Seismograph is used to measure:

Correct option is C

The correct answer is (c) earthquakes
• A seismograph is specifically designed to measure the movement of the ground caused by earthquakes.
• They are equipped with sensitive sensors that can pick up even the slightest vibrations in the earth's crust.
• These vibrations are then recorded and analyzed to determine the location, magnitude, and other characteristics of the earthquake.
• The sudden tremors or shaking of the earth's crust is called an earthquake.
• The earth’s crust is made up of different parts of various sizes. They are called plates.
• Most of the earthquakes in the world are caused by the movements of the plates.