Which statement best expresses the main idea of the passage below? Peru has three distinct geographic regions:
Cold, mountainous Sierra
Dry coastal plain
Warm, forested selva

The ways people live in these regions are very different. For example, many people on the coastal plain live in cities, while most people in the Sierra live in small villages.

A. Peru’s Sierra is mountainous and cold

B. Peru’s geography affects the lives of it’s people.

C. There are no cities in Peru’s Sierra region.

D. Peru’s geography is not varied.