The muslim leaders are called Imam
Technological innovation and growing<span> trade with other nations. Industrial growth.</span>
These two river valleys were similar, because they both had a government form in hierarchy. They both had a ruler, and they were in the monarchy system. Some of the systems were considered to be well off systems because they were able to rule without disruptions and others had systems which were not in equality with men and women.
B is the only answer that makes sense.