Discussion
Fall in sea level is caused by .................... .
Answer: B
The key's answer is isostatic rebound.
When an ice sheet melts, the land that was pressed down by its weight slowly rises again. As the land rises, the sea level relative to that coast falls, leaving raised beaches high above today's shore, as around Scandinavia and Hudson Bay.
Melting of ice sheets returns water to the oceans and raises sea level. Evaporation does not lower sea level, since the water comes back as precipitation and runoff. Hydroisostasy is the sinking of the ocean floor under the weight of added water, a side effect of a sea-level rise, not a cause of a fall.
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