There will be little change in the solar system but gravity will pull the sun and all the other planets with it into a new orbit. Even though the two galaxies have many millions of stars it would be rare for any to combine/join. Hope this helped!
When winds move air masses, they carry their weather conditions (heat or cold, dry or moist) from the source region to a new region. When the air mass reaches a new region, it might clash with another air mass that has a different temperature and humidity. This can create a severe storm.
B. plateau is the only landform anyways