The hilly terrain of Manipur makes it particularly vulnerable to:

Landslides
Cyclones
Tsunamis
Droughts

The correct answer is landslides.

Landslides are a major hazard in Manipur, and they are caused by a number of factors, including heavy rainfall, deforestation, and earthquakes. Landslides can cause significant damage to infrastructure and property, and they can also result in loss of life.

Cyclones are not a major hazard in Manipur, as the state is located inland and is not directly affected by tropical cyclones. However, cyclones can cause damage to coastal areas of Manipur, and they can also cause flooding in low-lying areas.

Tsunamis are also not a major hazard in Manipur, as the state is located far from the Indian Ocean, where most tsunamis occur. However, a tsunami could potentially affect Manipur if a large earthquake were to occur in the Bay of Bengal.

Droughts are a major hazard in Manipur, and they can cause significant damage to agriculture and the economy. Droughts can also lead to water shortages and famine.

In conclusion, the hilly terrain of Manipur makes it particularly vulnerable to landslides. Landslides are a major hazard in the state, and they are caused by a number of factors, including heavy rainfall, deforestation, and earthquakes. Landslides can cause significant damage to infrastructure and property, and they can also result in loss of life.