Answer:
The Ancient Greeks didn't have the technology at the time to send messages so they developed different ways to communicate to people at long distances. During a war, Ancient Greek armies developed a tool called the Stentorophic Horn. Ancient Greeks also used light signals to send urgent messages to armies.
The Sierra Nevada is the mountain range that is between the Central Valley depression and the Basin and Range Provice
The answer is C, and the reason why is because the climate changed and since they where not used to that, that affected them, also rainfall and flooding started to shrink and that also contributed to the downfall of the Old Kingdom.
The goyim forced them to relocate to ghettos then work in labor camps .
