Final answer:
Sea-level rise is the phenomenon of the sea level increasing due to global warming. It causes the shoreline to move further inland, impacting coastal cities and ecosystems.
Step-by-step explanation:
When the sea rises and the shoreline moves inland across the continent, it is due to the phenomenon of sea-level rise. Sea-level rise refers to the increase in the average global sea level caused by the melting of glaciers and the expansion of seawater due to global warming.
As the sea level rises, it causes the shoreline to shift further inland, potentially affecting coastal cities, islands, and ecosystems.