The first versions of the Liberty Bell had cracks in it, but those cracks were repaired. It is however not known exactly how it got the crack that we know today: the version most cited today propose that it cracked during the birthday celebration of George Washington.
Answer:
Wheels
Explanation:
A lot of things use wheels and are made from them today, help with construction, transportation, etc.
Prosocial behavior is characterized by behavior that is beneficial to other people or to society as a whole.
number 3: Migration of people
The answer is A.) Factories were dirty, hot, and poorly ventilated and work days were 12-16 hours long with a six day week.