Final answer:
Mountains and the ocean are the two dominant features of Greek geography, guiding ancient civilizations like the Mycenaeans, Minoans, and Cycladic peoples to thrive through maritime activities.
Step-by-step explanation:
The two features that dominate Greek geography are Mountains (B) and The ocean (D). Greece's terrain is largely mountainous, with rugged hills and few plains for agriculture. This difficult terrain led the ancient Greeks to turn to the sea for sustenance and trade, with the Aegean Sea and surrounding waters playing a central role in their civilization.
Unlike the river-based societies of Egypt and Mesopotamia, the Greeks could not rely on great rivers feeding fertile soil, thus the ocean became a crucial aspect of Greek life for travel, trade, and access to resources. The Mycenaeans, for example, needed the sea due to Greece's poor, rocky soil and lack of substantial mineral deposits. Additionally, the Minoan and Cycladic cultures heavily relied on the seas around them.