Which of the following is not a reason why rivers were important to early trade?
a. waterways allowed for faster travel than land routes.
b. they were a system of canals and devices to limit, store, and move water.
c. they created more opportunities to trade with neighboring settlements.
d. they encouraged growth, since more people sought to live in urban areas as trade centers grew.

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes