Wind erosion is the main cause. And since it is the desert that wind can pick up tiny sand rock particles that slowly grind against the rock. Over time the erosion will give a jagged rock the smooth features as if it had been submerged in a river for the roughly same period of time.
Answer:
Canada's demagraphoc or diversity is a composition that is ethnically heterogeneous, while in the sense that all of Canada's citizens have basically come from many countries or even a orgin and cultural backgrounds. For example on way to depict cultural diversity in Canada is to describe the diversity in Canada in terms if the population size of even those that are not belonging to the charter groups.
Canada is a multicultural society whose ethnocultural make-up has been shaped over time by immigrants and their descendents. Each new wave of immigration has added to the nation's ethnic and cultural composition. Over time, patterns of immigration have shifted. Historically, most immigrants came from Europe.
I hope this helps :)
The answer would be the Farming Industry.
