Answer:
This question says Why do YOU think. It is an opinion question, so you are supposed to say what you think. There is no right or wrong answer in this case.
:)
Answer:
Many men became rich and brought their families, leading to bustling towns of successful small business owners. Mining towns did well with little regulation from the government, leading to the establishment of more independent towns in the West.
‘fall suddenly’ is what it means in historical terms. Hope this can help! :O