Ithink the answer is all of the above
Yes they do occurs in certain features
Chain of islands southeast of the Virgin Islands is Bermuda. It's huge Royal Naval Dockyard complex joins present day attractions like the intuitive Dolphin Quest with oceanic history at the National Museum of Bermuda. The island has a particular mix of British and American culture, which can be found in the capital, Hamilton.
Currents involve movement of ocean water masses, driven either by wind or by differences in temperature, salinity and density. The most important from a human perspective are the wind-driven surface currents that move water in the uppermost layer of the ocean.
Currents affect humans in several primary ways. Currents help shape the climate in the areas where we live, create the right conditions to support abundant ocean life in the areas where we fish, and change weather patterns through periodic events like El Nino/La Nina.
Ocean currents also cause upwelling in many areas like off in the inland parts of North America, where surface currents taking water away from the shore cause nutrient-rich water to well up from the ocean deeps. The abundance of nutrients in these areas forms fertile ground for kelp beds and marine fisheries, which in turn furnish food for humans. Alterations in current patterns like the El Nino/La Nina cycle affect humans as well by causing changes in local weather patterns in the years when they occur.
Differences between Indus, Nile, and Yellow river valley civilizations are (please refer the attached image)
Learn more about the Indus, Nile, and Yellow valley civilizations here:
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