What are three reasons cities grew in the early 1800s?

I really don't know for sure. According to my Texas history book, urbanization is understood to mean people working in a city. So some reasons for urbanization would conclude:
*Working: To get money
*A mother raising her young; being a stay at home mom is a lot of work as well.
*Running your own business
I really do hope this helped. Thanks you for having the time to read my nerdy note. Thanks so much...and I'm so sorry if i didn't give you exact information. I appreciate your time! :)