The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The industrial revolution marks the beginning of the massive use of fossil fuels by societies for energy purposes.
These fossil fuels such as charcoal or oil were used to make machines function for long operation hours in the fabrics of industrial America. At that time, many people left the rural areas of the country and decided to move to larger cities such as Chicago and New York to work in the factories that were hiring workers. They worked there under low salaries and unhealthy working conditions. Those fabrics polluted air and many times, water.
