I don't know what your choices are, but I would imagine that the answer is the process of crossing over. Next time please provide the choices that you're given :)
Be respectful. Helpful. Understand exactly what's being asked of you. are a few
D. all of the above
should be the answer on the pretest
The vegetation of the tundra is composed of shrubs, grasses, mosses, lichens. Tree vegetation is very rare because of low temperature and short growing season.
