Question

source: https://www.weathergamut.com/2013/01/13/winter-and-the-jet-stream/ which of the following best explains a result of the seasonal shift of the jet stream? dok 2 in the summer, the polar jet stream allows warm air to move through canada. in the winter, the polar jet stream allows warm air to move up into canada. in the summer, the polar jet stream allows cold air to move down into the central united states. in the winter, the polar jet stream allows cold air to move down into the central united states.

Explanation:

The polar jet stream shifts south in winter, allowing cold Arctic air to push down into the central United States. In summer, the jet stream moves north, keeping cold air out of the U.S. and bringing warm air to Canada. The correct option aligns with the winter jet stream's position and effect.

Answer:

D. In the winter, the polar jet stream allows cold air to move down into the central United States.