The correct answer is c) Earthquakes.
Bihar is located in a seismically active zone, which means that it is prone to earthquakes. Earthquakes are caused by the movement of tectonic plates, which are large pieces of the Earth’s crust. When these plates move, they can cause the ground to shake. Earthquakes can range in size from small tremors that are barely felt to large earthquakes that can cause widespread damage.
Landslides are caused by the movement of soil and rock down a slope. They can be caused by a number of factors, including earthquakes, heavy rains, and deforestation. Landslides can be very destructive, and they can often block roads and railways.
Volcanoes are formed when magma, or molten rock, rises to the surface of the Earth. They can be found in a number of different locations around the world, but they are not found in Bihar.
Tsunamis are large waves that are caused by earthquakes or volcanic eruptions. They can travel at speeds of up to 800 kilometers per hour, and they can cause widespread damage when they hit land. Tsunamis are not a major threat in Bihar.