How can water be an agent for physical weathering?

The images show two different fronts.which fronts are shown? item a shows a cold front, and item b shows a warm front.item a shows an occluded front, and item b shows a cold front.item a shows a warm front, and item b shows a stationary front.item a shows a stationary front, and item b shows an occluded front.

As a result of the north american free trade agreement (nafta), canada now belongs to the world’s a. largest superpower b. first commonwealth c. first trade agreement d. largest trading bloc

After the communist party collapsed, what did the soviet union become?