House finches were found only in western North America until 1939, when a few individuals were released in New York City. These individuals established a breeding population and gradually expanded their range. The western population also expanded its range somewhat eastward, and the two populations have recently come in contact. If the two forms were unable to interbreed when their expanding ranges met, it would be an example of .
A) prezygotic isolation
B) reinforcement
C) allopatric speciation
D) sympatric speciation

Explanation:

Allopatric speciation is a type of speciation in which formation of species occurs due to geographical barriers like continental drift (partitioning of continents), origin of mountains, origin of ocean and origin of volcano

Allopatric speciation has least character displacement

The fixation of somatic modification into genetic modification is called character displacement upon change in environmental condition and niche overlap ecotype are examples of character displacement

In the given example, two forms of population were unable to interbred when their expanding ranges met, it would be an example of allopatric speciation

coal is not sustainable because it will one day run out.

answer; i believe that the correct answer is (light);