Which of these would be an example of allopatric speciation?

Last updated: 7/9/2022

Which of these would be an example of allopatric speciation? A species diverges into two different species due to adaptation to local environments. A handful of fish swim across a temporary stream connecting two lakes and after many generations a new fish species is formed. the formation of different species in populations that are not geographically isolated from one another. A diploid species becomes a new tetraploid species due to nondisjunction. several different species of trees evolve in a connected, single forest