A cliff is a rock exposure with a near vertical (or is vertical) facing. An escarpment is a long cliff, or steep slope. (causes faulting processes)
The Blue Nile begins at Lake Tana in Ethiopia and flows into Sudan from the southeast. The two rivers meet just north of the Sudanese capital of Khartoum. The northern section of the river flows north almost entirely through the Sudanese desert to Egypt, then ends in a large delta and flows into the Mediterranean Sea.
D ..at the end of the construction of the canal it was estimated that 22,000 died during the earlier french effort to build the canal.
A) United States
He was 28th president of USA