Answer:
Navigable rivers and geographical conditions.
Explanation:
Rivers and moderate distances between the countries have been an advantage for Europe because it makes it easy to transport goods all across the realm. Rivers and canals provided transportation routes for goods and people. Rivers use to transport goods between coastal harbors and the inland, aiding economic growth, and they bring people and goods together.
Birmingham's nickname was "Bombingham" because there had been about 60 unsolved bombings and no one arrested for them.
An air mass has the same temperature, humidity, and precipitation throughout.
