In 4-5 sentences, explain how life in cities in the United States improved in the late 1800s and early 1900s. Please make sure to describe innovations in public transportation and travel as well as how technology helped solve some of the problems of crowding. Intended for 8th grade.

During the late 1800s and early 1900s, life in cities in the United States improved significantly. Innovations in public transportation such as the introduction of electric streetcars and subway systems made it easier for people to travel around the city efficiently. Additionally, advancements in technology helped solve some of the problems of crowding in cities. The invention of the elevator allowed for the construction of taller buildings, which helped alleviate housing shortages. Furthermore, the development of new sanitation systems helped improve public health and reduce the spread of diseases in crowded urban areas. Overall, these advancements in public transportation and technology played a crucial role in enhancing the quality of life for city residents during this time period.