How do people defend their coastline?

People defend their Coastlines through a variety of methods, including the construction of physical barriers like seawalls, groins, and jetties to prevent erosion and flooding. Beach nourishment, which involves adding sand to eroding beaches, is another common strategy. Additionally, communities may implement natural solutions, such as restoring wetlands and mangroves, which can absorb storm surges and provide habitat. Coastal zoning and regulations also play a role in managing development and protecting vulnerable areas.