Snapping shrimp used to be able to swim from the Atlantic Ocean to the Pacific Ocean by traveling between North and South America. However, when the Isthmus of Panama appeared (a land bridge that connects the Americas), the shrimp could no longer travel between the oceans and evolved into different species. This an example of:

a. sympatric speciation
b. allopatric speciation
c. punctuated speciation
d. genetic drift

B. Allopatric speciation

Explanation: Allopatric speciation is a term used in the field of Biology to describe the separation of a specie from its own members by Geographical barrier

Tthis will prevent the species from interacting with each other either Sexually or through other means, this barrier can be in the form of physical structures like mountains, rocks,buildings Icebergs etc. This type of speciation can lead to extinction of a specie as it can may be difficult for population growth or development of the affected species.

well, i believe that the answer is 2. : 3