Answer:
A
Explanation: because they have always been Nomadic tribes they where able to settle down and build there homes and farming allowed them to do that.
Answer: The Civil War
Explanation:
The Civil War took place in America over an internal struggle. It was over two different beliefs and the country was divided over this idea. This led to a struggle that would be one of the bloodiest wars in american history.
The Khmer people, now native of Cambodia, were apart of a Kingdom named <span>Kambuja. Kambuja was located in the era of the Iron Age in India. </span>
You're off by a few there lol :D Earth is actually 4.54 billion years old.