Question 1133196
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The <U>ANSWER</U>  is A).  The tidal pull of the moon.



See the article  <A HREF=https://www.caryinstitute.org/sites/default/files/public/downloads/curriculum-project/tides.pdf>Tides in the Hudson River</A>   at this link


https://www.caryinstitute.org/sites/default/files/public/downloads/curriculum-project/tides.pdf


The citation from this article is below:


    "Due to the topography of the landscape, enclosed bays can have tidal ranges of 20 or 40 feet! 
     The largest daily tide on the Hudson River is over 6 feet, while the smallest is under 3 feet. 
     The tides in the Hudson come from the rising and falling of the water at the mouth of the river, not the direct action of the moon."
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Good question, and the answer, which I found in the Internet, was unexpected to me . . . 


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Added 2 hours later . . . 


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Regarding the "Black River",  see this Internet page

https://tides.mobilegeographics.com/locations/591.html


The maximum tides are about 3 ft there.
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