The correct answer is: a) Earthquakes.
Nagaland is located in a seismically active zone, which means that it is prone to earthquakes. Earthquakes are caused by the sudden release of energy when tectonic plates move or grind against each other. The energy released by an earthquake can cause the ground to shake, which can damage buildings and infrastructure. In severe cases, earthquakes can also cause landslides and tsunamis.
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 can reach heights of up to 30 meters. Tsunamis can cause extensive damage to coastal areas, and can also cause loss of life.
Volcanic eruptions are caused by the release of magma, gas, and ash from a volcano. Volcanic eruptions can be very destructive, and can cause loss of life and property.
Cyclones are large, rotating storms that form over warm waters. They can cause extensive damage to coastal areas, and can also cause loss of life.
Nagaland is not prone to cyclones, as it is located inland. However, it is prone to earthquakes, as it is located in a seismically active zone.