Which impact did mountains have on the development of Greek city-states?• They isolated the city-states and made them independent.

• They helped increase trade between the city-states.
• They had fertile soil so people farmed in the mountains.
• People in the mountains worked as sailors and merchants.

The correct answer is:

• They isolated the city-states and made them independent.

Mountains played a significant role in isolating Greek city-states from one another. The rugged terrain made communication and transportation difficult, fostering the development of independent and autonomous city-states. This isolation contributed to the unique development of different political systems, cultures, and identities within each city-state.