Which statement best completes the diagram?
Cause
Effect
2
People begin to live in
permanent settlements.
A. Rivers around the world start to flood.
O
B. People begin using clay to make pottery.
C. The first written languages are created.
D. Humans learn to grow crops.

Which course of action did president carter propose in order to solve this problem for the next generation? a. contract with foreign nations to build wind turbines b. reduce federal spending on solar cell energy research c. drill fewer offshore wells to conserve marine life d. develop alternative energy sources