Multiple choice general knowledge

Eustatic changes in the sea levels are caused by-

  1. Ice ages

  2. Epirogenic movements

  3. Orogenic movements

  4. Isostatic changes
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A Correct answer
Explanation

Eustatic changes refer to worldwide changes in sea level caused by changes in the total volume of water in the oceans or changes in the ocean basin's capacity. The primary cause of eustatic sea level changes is the growth and melting of continental ice sheets during ice ages (glacial and interglacial periods). When ice ages occur, water is locked in ice sheets, causing sea levels to drop globally. When ice melts, sea levels rise. Options B, C, and D refer to local or regional changes, not global eustatic changes.

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