Why did the people of Ancient Greece come to depend upon the sea

Because farming didn't produce huge surpluses, and travel across the terrain was difficult, the Greeks came to depend on the sea.

they loved to raise crops and animals suited to the environment

Explanation:

Ancient Greeks raised crops and animals well suited to the environment. ... Because farming didn't produce huge surpluses, and travel across the terrain was difficult, the Greeks came to depend on the sea. People living near the Mediterranean, Aegean, and Ionian Seas became fishers, sailors, and merchants