Form a more perfect union establish justice insure domestic tranquility provide for the common defense and provide the general welfare.
Passengers, crops, and petroleum are transported on the Niger River, so the correct answers are 2, 4, and 7. The Niger River is one of the most important rivers in Africa, as it is used to transport resources from one part of Africa, to others, which may be otherwise inaccessible by other routes. This way, nobody has to starve no matter where in Africa they are located.
