The above fact is absolutely true.
- Media has the power to influence society by the way it presents facts, news, etc.
- It is also impacted by the society itself. For example, news of society is the media's news only.
- So the answer is true.
Hope you could get an idea from here.
Doubt clarification - use comment section.
The most obvious reason is that one has to pack up and go because things are not so good at home. Long ago, that probably meant that the climate had changed and made life impossible. It might have become too hot or too cold or too wet, which in turn would have affected not only quality of life but also make survival a shaky proposition. Drought, flood, and temperature changes could certainly push people to move on.
I hope that helped a little.