Coastal defenses are structures designed to protect coastlines from erosion, flooding, and storm surges. These defenses can include sea walls, breakwaters, and dunes, which help absorb wave energy and reduce the impact of high tides. They are essential for safeguarding coastal communities and infrastructure. In addition to physical structures, coastal defenses can also involve natural solutions like mangroves and salt marshes. These ecosystems act as buffers, slowing down waves and trapping sediments. By combining engineered solutions with natural methods, coastal defenses aim to create a more resilient shoreline against the effects of climate change and rising sea levels.