Astudent argues that being separated geographically is the only way for speciation to occur. why is he wrong?

He is wrong because "Specialization can occur from biological forces as well."

Explanation:

The biological forces are the non-social factors which enhances the physical structure of a person, mostly it is about the human physic. Biological forces also affects the person's psychological as well as the sociocultural forces in order make a fully organized and developed human being or a person.  Not only the physic it may be any physiological, chemical, neurological or can be genetic condition. They are the primary factor to know the behavior of a person.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides