Why is an isthmus significant in geography?

An isthmus is significant in geography primarily because it connects two larger land areas. This geographical feature plays a crucial role in several contexts, such as facilitating migration, trade, and cultural exchanges between the two land masses it links. The narrow strip of land can create land routes that are vital for transportation and economic activities, particularly in regions where sea travel is less feasible or more dangerous.

While there are interesting aspects associated with trade routes and the presence of water bodies, those don't define the primary characteristic of an isthmus itself. An isthmus does not typically contain large bodies of water, nor is it generally regarded as a natural barrier to wildlife, as it serves more as a connective pathway than a barrier. Therefore, the defining significance of an isthmus in geography lies in its role as a connector between two larger land areas.