Hi,
The Western frontier took 137 years for it to be finally settled.
They were based on the elements
Let's say you have a chicken and you want to trade said chicken for a cow. A barter economy means that you have to find someone who has a cow and wants a chicken. You must rely on a person coincidentally wanting a chicken but has a cow.
The factor that caused various cities to conduct strikes in 1919 was demobilization. The correct option among all the options that are given in the question is the last option or the fourth option. Demobilization is actually the standing down of the armed forces from combat ready status. I hope the answer helps you.
After the Romans left Britain, the many towns set up by the Romans were abandoned and crumbled away as the new settler, Anglo-Saxons people went back to living in the countryside because they were farmers and build new kingdoms.
However, some Roman towns continued to exist and still exist today, which indicates the rich culture of the Romans.