Final answer:
The paragraph describes how tourism acts as a key economic driver by earning foreign exchange, generating income for local communities, and promoting cultural exchange.
Step-by-step explanation:
The main idea of the paragraph is that tourism provides significant economic benefits to a destination country through foreign exchange earnings, income generation for local businesses, and fostering cultural exchange. It explains how tourists spending money on goods and services contribute to the local economy and how community-based tourism can empower economically disadvantaged groups.
Additionally, tourism leads to cultural interactions and exchanges, enriching both visitors and the host community.