The rivers that should be listed together with the question are as follows:
<span> La Plata, Amazon, Orinoco
</span>
Also, the order above is the correct order of the <span>amount of desertification among river basins in south america. Hope this answers the question. Have a nice day.</span>
In terms of individual states, the answer would be New Jersey. Otherwise, the REGION that is most densely populated is the east coast, specifically the Northeastern part of the U.S.
Hope this helps!