2. Which of the following regions can be defined by the language spoken there?
А
The Nile River system
В.
Southeast Asia
hc. New Mexico
D
Quebec

Quebec is a region that can be defined by the language spoken there.

Explanation:

A is not correct because there are numerous cultural and linguistic groups in the Nile River system.

B is not correct because this region has a lot of different languages, not a single one all around.

C is not correct because New Mexico is not a region defined by its language, but it is defined by its federal borders.

D is correct because Quebec is a region in Canada that is defined by the language spoken there, which is the French language, a remnant of the French colonization of this region.