When continental polar air moves over a relatively warm lake, such as one of the great lakes, the air mass acquires both heat and moisture, resulting in on the land leeward of the lake?

The correct answer is - rain.

When the cold and dry air from the polar parts moves over the Great Lakes it accumulates heat and moisture, thus changing its structure. By becoming warmer and moist, the air masses start to create clouds, and as they move forward, on the place where they will come up to a natural barrier will start to produce rain. Because of this, the leeward land of the lake will be getting rainfall, and it will be much more wet than the windward side of the lakes.

In this case, the natural barrier will not be a mountain range, but instead, the land itself, as the air masses above the land, and the air masses above the lakes have different properties.

d. stage 4

explanation:

the existence of some kind of demographic transition is widely accepted in the social sciences because of the well-established historical correlation linking dropping fertility to social and economic development.[1] scholars debate whether industrialization and higher incomes lead to lower population, or whether lower populations lead to industrialization and higher incomes. scholars also debate to what extent various proposed and sometimes inter-related factors such as higher per capita income,lower mortality, old-age security, and rise of demand for human capital are involved.[2]