Question

a population of squirrels that once bred and lived together is now separated by a large river. they are now unable to reach each other. this is an example of which form of speciation? allopatric speciation empathetic speciation sympatric speciation

Explanation:

Allopatric speciation occurs when a population is separated by a physical barrier (like the river in this case), preventing gene flow. Sympatric speciation happens without physical separation. "Empathetic Speciation" is not a recognized term in speciation biology.

Answer:

Allopatric Speciation