The correct answer is Mantle .

The Earth is composed of several layers, including the crust, mantle, outer core, and inner core. Each of these layers has unique properties and is responsible for different processes that occur on the Earth’s surface.

Convection currents are responsible for the movement of tectonic plates, which make up the Earth’s crust. These currents are found in the mantle, which is the layer located beneath the crust.

The mantle is a thick layer of rock that extends to a depth of about 2,900 kilometers below the Earth’s surface. It is divided into several layers based on their physical and chemical properties. The upper mantle is more rigid and is responsible for the movement of tectonic plates, while the lower mantle is more fluid-like.

The convection currents in the mantle are driven by the heat generated from the Earth’s core, which causes the mantle to move in a circular pattern. This movement of the mantle causes the tectonic plates to move, leading to various geological phenomena such as earthquakes, volcanic eruptions, and the formation of mountain ranges.

In conclusion, the convection currents responsible for the movement of tectonic plates are found in the mantle, which is the layer located beneath the Earth’s crust. The movement of the mantle is driven by the heat generated from the Earth’s core and causes various geological phenomena to occur on the Earth’s surface.