1b) The Níger river is important because it helped the grow their crops and control trade on the river.
The last one is the answer.
A wealthy individual who gives much of their fortune to good causes. Bill Gates can be considered as one.
The U.S. Confederation Congress decided in 1787 that the Northwest Territory would eventually become "new states in the Union," since this was the first time the Us government had ever designated land for such a purpose.
