B. The rivers were used to sustain life by growing crops and food and having an unlimited drinking supply.
The automatic power loom is the source of the manufacturing of cloth
<span>highly developed and prosperous (novanet)</span>
The Panama Canal because it makes the most money and is the most important out of all the four.
Wind, Because wind takes a long time to pick up enough dirt particles or etc to push them on whatever foundation the wind is blowing at.
