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.
Human population does not yet amount to 8 billion people - the correct answer is D! Currently the population is 7.4 billion and it's predicted to be around 8 billion between 2020 and 2025
All the other statements are true, for example we are expecting serious droughts soon.
