What aspect of Greece's geography allowed Athens to become sea traders that had contact with many other lands across the Mediterranean Sea?

Location along the Aegean sea

Explanation:

Athens was located along the Aegean sea which fed into the Mediterranean sea. This allowed Athens to develop into seafarers and traders who traveled to other lands and spread their influence as well as learn about the world.

This also allowed Athens to develop a powerful navy that was feared at the time. The navy was Athens' main military strength and enabled them defeat the Persians at Salamis.