Final answer:
The white man's impact on the Aboriginal population in Canada resulted in a significant decline in numbers, from 2,000,000 to under 125,000.
Step-by-step explanation:
The subject of this question is History. The question is inquiring about the impact of the white man on the Aboriginal population in Canada.
After encountering the white man, the Aboriginal population in Canada fell from 2,000,000 to under 125,000. This decline can be attributed to factors such as diseases brought by the Europeans, forced relocations, and conflict.
It is important to note that while the Aboriginal population experienced a significant decline, there is ongoing cultural revival and efforts to preserve indigenous languages and traditions.