A founding population of lizards arrives on an island. Which type of isolation would most likely result in this population becoming a new species?

Geographical isolation is most likely to lead this founding population to become a new species. If the lizards are separated from populations elsewhere by the ocean, they cannot regularly interbreed, so differences can accumulate over many generations. Behavioral or temporal isolation can also reduce interbreeding, but the island setting most directly points to a physical geographic barrier.

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