Photos by Eric Kounce, US Army Corps of Engineers, US Dept. of Energy, and Leaflet Which of the photos above shows hydroelectric power?
A.
one (1)
B.
two (2)
C.
three (3)
D.
four (4)

Why are nongovernmental organizations important? check all that applya. they are private institutions that aid the work of government.b. they often fill in gaps between government-funded services. c. they are private institutions that attack government policyd. they citizens by acting as watch dogs over elected officials

According ti the following map, what are the most common mineral resources found in the united states?

Based on the information in the graph, what can you conclude about humans in the world in general?