Shoreline
Shoreline explained in an easy to understand way:
Imagine trying to keep your house tidy while your kids play with their toys. Just as it's challenging to maintain a clear boundary between clean and messy spaces at home, the shoreline represents the boundary between land and water, constantly shifting and changing with the tides. The clutter of toys represents the water's ebb and flow, while your efforts to tidy up mirror the shoreline's attempt to maintain a distinct line between the land and the sea.
Practice Version
Shoreline: The boundary between the land and a body of water. Shoreline. In Science, the shoreline is where the land meets the ocean, lake, or river, constantly changing due to waves, tides, and weather.