Well, at the 52 B.C. Roman conquering of the Paris basin, it was already an important crossroads between river and road travel (a place where a major north-south route crossed the Seine river across its central island), but it is not certain that the area was the major habitation then (the nearest known major Celtic population centre was in today's Sens). Anyway, the Romans took an interest Paris' island it for its strategic position for a garrison and lightly fortified it, but when it later become a trading centre, Gallo-Roman growth spread to the Left Bank.
Answer:
desert and sand that slowed wagons to crawl
The population in Ghana has drastically changed from how it was thousands of years ago. Ghana basically had less than a million people. In 1960, it had 6.652 million people living there after several colonizations. Now it has 27.41 million people residing in the country. From 1960 to now, it has increased by 412%.
The correct answer is: "a supply curve"
The supply curve is a function that represents different combinations of prices and quantities. Those quantities, are the amounts that producers of a certain good or service are willing to manufacture and/or sell at each price level.
It is an upward-sloping function as, according to the law of supply, the higher the market price, the larger the number of units that producers are willing to supply in the market.