How did the physical features of a region and limited natural resources necessitate trade between societies?

Physical features such as mountains, rivers, and deserts often created barriers that limited access to essential resources like fertile land, water, and minerals in certain regions. When Natural Resources were scarce or unevenly distributed, societies were compelled to engage in trade to acquire what they lacked. This interdependence fostered economic relationships, cultural exchanges, and the development of trade routes. As a result, trade became essential for survival and growth, linking disparate communities and facilitating the exchange of goods, ideas, and technologies.