Explain how life in cities improved in the late 1800s and early 1900s. be sure to describe innovations in public transportation and travel as well as how technology solve some of the problems of crowding.

there were faster and more efficient means of transport

Hello my dear friend!

There were several transformations in the transition from the 19th to the 20th centuries. These included advances in medicine, architecture and basic sanitation, which ensured that quality of life not only improved but was maintained. All this adds up to the rise of the fastest and most efficient means of transport, which has allowed longer distances to be covered in less time.

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answer; i do believe its (b) 12.5 years of age;

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d