Final answer:
The city-states of Ancient Greece, including Grease, were formed due to the conditions of geography and geopolitics, specifically the mountainous terrain of Greece.
Step-by-step explanation:
The correct answer is option b. Geography.
The city-states of Ancient Greece, including Grease, were formed due to the conditions of geography and geopolitics. The Greeks were dispersed around the Mediterranean and divided into self-governing units called poleis or city-states. These city-states were established in different geographical areas with natural boundaries such as mountains and the sea, which led to the development of separate and independent political entities.
Geography played a significant role in shaping Greek civilization and the formation of city-states. The mountainous terrain of Greece made it difficult for a centralized government to control the entire region, leading to the emergence of city-states with their own governments, laws, and customs.