Answer & Explanation:
Many people in California figured gold was there, but it was James W. Marshall on January 24, 1848, who saw something shiny in Sutter Creek near Coloma, California. He had discovered gold unexpectedly while overseeing construction of a sawmill on the American River.
first one is minor. minor is often just paid down by money, speeding is a minor crime
second is major, major is often paid down with prison time.
Third is felony, felony is the most extreme, murder is an example of a felony. Felony is often jail time for over 5 years
Some of their problems was lack of nation-building experience, poor infrastructure, and massive amounts of damage incurred during their revolutions for independence. But for most of them that were explored they had many problems until nowadays.
Rivers often act as really effective and accessible trade routes, so the historian could use this map to analyse trade routes between Early River Valley Civilizations.
Hope this helps :))