What was the cause of the urbanization that took place in the 1800's?

The cause of the urbanization that took place in the 1800's is the growth of the industry.

Explanation:

The American industry was going through a tremendous economic growth, so fast that caught the attention of millions immigrants in rural situation to go to the United States and seek for employment so they could get better life quality for them and their families.

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.