Explain why life in cities improved the late 1800 and early 1900? be sure to describe innovations in public transportation and travel as well as how technology solve some problems of crowding. plz hurry i need asap!

Read the following passage. the early mill girls were of different ages. some were not over ten years old; a few were in middle life, but the majority were between the ages of sixteen and twenty-five. the very young girls were called "doffers." they "doffed," or took off, the full bobbins from the spinning frames, and replaced them with empty ones. based on the passage, early mill girls were mostly young. were mostly middle aged. were of a variety of ages. were mostly children.