Why was there a growth of towns near waterways in medieval towns?

Waterways helped not only with living (access to it) but also was useful when it comes to transport and trade for a long distances - using ships was much easier and safer for big parts of a commodity than typical roads

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.