The primary cause of rising sea levels is the melting of glaciers and ice sheets, particularly in Greenland and Antarctica, due to increasing global temperatures.

Low-lying coastal areas, such as deltas, barrier islands, and coastal plains, are most vulnerable to the impacts of rising sea levels due to their low elevation and proximity to the ocean.

Rising sea levels can cause coastal erosion through various processes, including wave action, tidal currents, and storm surges. These processes erode coastal landforms, leading to the loss of beaches, cliffs, and other coastal habitats.

Coastal displacement refers to the movement of people away from coastal areas due to rising sea levels and other climate-related hazards, such as coastal erosion and flooding.

All of the listed coastal ecosystems, including mangroves, coral reefs, salt marshes, and seagrass beds, are particularly vulnerable to the impacts of rising sea levels and coastal erosion due to their low elevation and sensitivity to changes in environmental conditions.

Coastal defense refers to the construction of structures, such as seawalls, breakwaters, and levees, to protect coastal areas from rising sea levels and coastal erosion.

Bangladesh is considered to be one of the most vulnerable countries to the impacts of rising sea levels and coastal erosion due to its low-lying geography, extensive coastline, and high population density.

Coastal accretion refers to the process by which coastal ecosystems naturally adapt to rising sea levels by accumulating sediment and building up their elevation.

Ecosystem-based adaptation, nature-based solutions, and green infrastructure all involve restoring or creating natural coastal ecosystems to protect against rising sea levels and coastal erosion.

Coastal inundation refers to the process by which coastal areas are gradually submerged by rising sea levels, resulting in the loss of land and infrastructure.

Coastal retreat, managed retreat, and strategic retreat all involve relocating people and infrastructure away from vulnerable coastal areas to reduce the risks associated with rising sea levels and coastal erosion.

Coastal conversion refers to the process by which coastal ecosystems are gradually converted into other types of ecosystems, such as salt marshes or mangrove forests, due to rising sea levels.

Coastal elevation, land reclamation, and vertical land adjustment all involve raising the elevation of coastal land to protect against rising sea levels.

Coastal migration refers to the process by which coastal ecosystems naturally migrate landward in response to rising sea levels, allowing them to maintain their elevation and ecological functions.

Climate change mitigation, greenhouse gas reduction, and carbon emission control all involve reducing the emission of greenhouse gases to mitigate the impacts of climate change on rising sea levels.