The Canadian-U. S. border is what type of boundary? a- Geometric
b- Linguistic
c- Religious
d- Physical

Correct answer is a- Geometric .

Explanation:

A is the correct answer as the border is practically like a line that goes along the 49 parallel.

B is not correct as people in both states are speaking English language.

C is not correct also, as we have members of same religions in both countries.

D is not correct as in some parts, like around the lakes the boundary is physical, but mostly as we have said it follows the 49 parallel.