The earth's part responsible for causing earthquakes is :

Question

Accepted Answer

The correct answer to the question "The earth's part responsible for causing earthquakes is" is Option 1: crust of earth.

1. **Explanation for Option 1 (Crust of Earth):**
   The Earth's crust is the outermost layer of the planet and is composed of solid rock. It is divided into several large and small tectonic plates that float on the semi-fluid layer of the mantle beneath them. Earthquakes are primarily caused by the movement of these tectonic plates. When plates interact at their boundaries, they can either collide, slide past each other, or move apart. These interactions can cause stress to build up in the crust, and when this stress is released, it results in an earthquake. The crust is where these tectonic activities occur, making it the part of the Earth directly responsible for causing earthquakes.

2. **Explanation for Option 2 (Mantle of Earth):**
   The mantle is the layer beneath the Earth's crust and is composed of semi-solid rock that flows slowly over time. While the mantle plays a role in the movement of tectonic plates through convection currents, it is not directly responsible for causing earthquakes. Earthquakes occur due to the movement and interaction of the plates in the crust, not within the mantle itself.

3. **Explanation for Option 3 (Inner Core of Earth):**
   The inner core is the Earth's innermost layer, composed of solid iron and nickel. It is located far beneath the Earth's surface and does not play a direct role in the occurrence of earthquakes. The inner core is too deep to influence the tectonic activities that lead to earthquakes, which occur in the Earth's crust.

4. **Explanation for Option 4 (Outer Core of Earth):**
   The outer core is a liquid layer composed of iron and nickel, situated between the mantle and the inner core. Like the inner core, the outer core is too deep to have a direct impact on the tectonic activities in the Earth's crust. Earthquakes are not caused by processes occurring in the outer core, but rather by the movement of tectonic plates in the crust.

In conclusion, the Earth's crust is the correct answer because it is the layer where tectonic plates interact and cause earthquakes. The mantle, inner core, and outer core do not directly cause earthquakes, as they are not involved in the tectonic processes that occur in the crust.