The correct answer is: b) Coastal areas.
Cyclone shelters are constructed in coastal areas to protect people from the dangers of cyclones. Cyclones are large, rotating storms that form over warm ocean waters. They can cause extensive damage to coastal areas, including flooding, wind damage, and storm surge. Cyclone shelters provide a safe place for people to take shelter during a cyclone. They are typically built on high ground and are designed to withstand strong winds and flooding.
Option a) Mountainous areas are not suitable for cyclone shelters because they are not located in coastal areas. Option c) Flood-prone plains are also not suitable for cyclone shelters because they are at risk of flooding during a cyclone. Option d) Seismic zones are not suitable for cyclone shelters because they are at risk of damage from earthquakes.
Cyclone shelters are an important part of disaster preparedness in coastal areas. They can help to save lives and reduce the damage caused by cyclones.