Highlight the reasons why the Greeks left their homeland?

The Greeks left their native lands for the following reasons:

1) Search for new lands for the development of the economy;

2) Search for new places for the development of trade;

Thus, in the period from the 7th to the 4th century BC, there was an active Greek colonization of the Mediterranean and Black Seas. There the Greeks established their colonies. After that, these colonies turned into trading cities. Thus, soon trade relations were established between the colonies and the Greek policies.