A delta is a low, watery land formed at the mouth of a river. It is formed from the silt, sand and small rocks that flow downstream in the river and are deposited in the delta. A delta is often (but not always) shaped like a triangle (hence its name, delta, a Greek letter that is shaped like a triangle).
They are a natural phenomenon - see the link below.
cataracts is not a organ off the body
its the condition of the eye when a layer develops over the eye blocking our field of view
this has to be removed through a operation
A cataract.
The Nile cataract is known as shallow waters in a river. This is usually seen in white or fast moving waters.
It is the first Cataract in Aswan
in nubia
Aswan,It stands on the east bank of the Nile at the first cataract and is a busy ... Aswan is the ancient city of Swenet, which in antiquity was the frontier town ... the Nile in the south, Swenet was the first town in the country, and Egypt
At Aswan.
Khartoum is the city located south of the 6th cataract!
Cataracts of the Nile are white water rapids of the Nile River, between Aswan and Khartoum.
CAtaract
cataract
the area is 200mi also it is part of Nubia
The distance between Abu Simbel and the Second Cataract on the Nile River is approximately 300 kilometers (186 miles).