Final answer:
The Mediterranean Triad consisted of grains, olive oil, and wine; the Greeks exported olive oil and wine as they produced enough surplus. These commodities were central to Mediterranean trade, which was bolstered by Greek colonies that served both economic and cultural expansion.
Step-by-step explanation:
The Mediterranean Triad refers to the trio of staple crops that were central to the diet and agriculture of ancient civilizations around the Mediterranean, which included grains, olive oil, and wine. The Greeks, especially during the time of the Minoan and Mycenaean civilizations, excelled in the production of olive oil and wine, leveraging the challenging agricultural conditions in Greece to focus on these valuable commodities. They were able to produce enough surplus to not only sustain their domestic needs but also to use olive oil and wine as export products, trading extensively across the Mediterranean region. This trade was facilitated by the strategic establishment of Greek colonies and trading posts, which not only spread Greek influence but also increased the reach of its commercial network.