Among all the countries that you mentioned, Gabon is the country that receives the most rainfall.
Mostly are formed(or carved by water or erosion) side of sea cliffs, Yosemite national park, some of California's lakes,
If hills happen to be on your question....then that should be the answer....hopefully i helped kk....have a great christmas when it comes and plzz give brainliest answer (trust me i need it)....
The waves crash into the sand, sometimes creating dunes, and it can also wash some sand out into the ocean. Hope this helps!