The increase in trade and commerce during the middle ages resulted in the increase of the growth of towns and cities.
A drainage basin is a very important concept to understand in geography. Drainage basins can be huge or even small depending on the location of it. A drainage basin is an area of land where precipitation which is any kind of water that falls from the clouds gathers and drains into a body of water.
I thinks it’s B
Srry if it’s wrong but I pretty sure that that’s it.