"Life in US cities improved in the late 1800s and early 1900s thanks to advances in transportation, such as streetcars and subways. These inventions made it easier for people to get around crowded urban areas. New technology, such as elevators, helped people to build taller buildings. This also led to in more living and working space, helping to prevent overpopulation. Improved hygiene and public health efforts reduced the spread of diseases, which led to healthier living conditions for city residents. The creation of new communication technology, such as telephones and telegraphs, also helped to connect people and improve the overall quality of life in urban areas. "
In 4-5 sentences, simplify this text and make it for 8th grade.