Across regions exhibiting a dialect continuum, which outcome arises when a dense bundle of isoglosses coincides with a major physical barrier such as a mountain range?

💡 Explanation

A high concentration of isoglosses alongside a geographical barrier reinforces language boundary formation because the barrier impedes communication and diffusion of linguistic features, leading to linguistic divergence rather than convergence. Therefore, a distinct language boundary is reinforced, rather than gradual changes or increased borrowing.

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