This means that they are unwelcome guests to someone elses home.
Answer:Rivers help geographer to understand how civilizations developed in several main ways.
1. If there is a river near an old civilization, you know where the civilization got their water from.
2. The civilization could have used the river for exporting and importing goods.
3. The civilization could have gone extinct or failed because of the river flooding.
Explanation:
I was told in civics that it means that you can sue in court for 20 dollars but then in the 1800s 20 dollars was a lot of money
C. a social, military and economic system
