I believe the answer is Turkey
Oceans change the land along the shore, forming tall cliffs and jagged coastlines. "The abrasive nature of seawater causes the rocks to erode over a period of time", the statement explains the type of weathering involved in this process
<u>Explanation:
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The abrasive nature of the sea water of the ocean causes erosion in the rocks which are along the shore. And, this occurs for a period of time causes the formation of the tall cliffs sometimes or to the jagged coastline the other time.
The duration of erosion decides the fate of the cliff or coastline. Erosion of rocks are highly evident in ocean shore line due to the effect of salinity of the sea water. The rocks gets eroded firstly to form jagged coastline which on long exposed erosion forms cliff.
I don't know if you have to choose only one answer, because answers 2, 3, and 5. It affected throughout the world, and it also reduced communist nations and changed boundaries.