Final answer:
The geographical resources of natural harbors and close proximity to the sea allowed for trading, fishing, sailing races, and made Greece vulnerable to invasions.
Step-by-step explanation:
The geographical resources of natural harbors and close proximity to the sea had several effects on Greece. Firstly, many people in Greece engaged in trading, fishing, and made a living from the sea, as it provided them with easy access to maritime activities. Secondly, the presence of natural harbors facilitated the organization of sailing races. Lastly, due to its accessibility, Greece was also vulnerable to invasions from various powers throughout history.
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