The correct answer is: a) Coastal districts.
Cyclones are a type of tropical cyclone that form over warm waters in the tropics. They are characterized by strong winds, heavy rain, and storm surges. Cyclones can cause extensive damage to coastal areas, including loss of life, property damage, and disruption of infrastructure.
Building cyclone-resistant houses and shelters is a priority in coastal districts because these areas are most vulnerable to cyclone damage. Cyclone-resistant houses are designed to withstand the high winds and heavy rain associated with cyclones. They are typically made of concrete or steel and have reinforced roofs. Cyclone shelters are public buildings that are designed to provide a safe place for people to take shelter during a cyclone. They are typically located in high-risk areas and are built to withstand the high winds and heavy rain associated with cyclones.
Hilly regions are not as vulnerable to cyclone damage because the mountains provide some protection from the high winds. Drought-prone areas are also not as vulnerable to cyclone damage because there is less water vapor in the air, which means that cyclones are less likely to form. Urban centers are also not as vulnerable to cyclone damage because they are typically built on higher ground and have better infrastructure.
In conclusion, building cyclone-resistant houses and shelters is a priority in coastal districts because these areas are most vulnerable to cyclone damage.