Answer:
There was a limit on population
Step-by-step explanation:
The agriculture was so low because of the type of soil there was and it made the Greeks travel to other colonies that possessed arable land. The mountains separated little communities from others so it made it hard to have just one government since the mountains made the rest of the population divided and isolated from each other. This is why there was two governments for the people divided by one side of the mountains and another for the other side of the mountain. Greece was not really unified when it came to governments because of mountains.
Hope that helps