Them bases symboled like rest areas boundary lines that enimies couldnt pass
Trade brought wealth and job opportunities to newly created cities. The Crusades fought for the freedom of serfs and the manorialism way of living. Factories employed those who would have been living on manors or under a King.
Explanation:
mass of water increases
freezing point of water decreases
sunlight in deeper locations decreases
buoyancy of objects in the water increases
amount of dissolved gases in water increases