The answer to your question is Niagara Falls
I think youre trying to ask what is Washington D.C. the capital of, if thats the case the answer is the United States
Sunna
in Yemen . Overall in the Arabian Peninsula most rain falls in the
South West, and up along the Red Sea coast in the southern half of the
Peninsula. and along the western half of the south coast/ There is also
some rain in the north east. However there are some parts, particularly
the central and south east that hardly ever see rain. Less than 3 cm per
year.
Deposition is when sediment is dropped off in a steep area.