<span>Slavery is the major issue among the North and the South. At the beginning of the 1850s, the Northerners became more and more hostile to the idea of slavery on moral grounds, whereas slavery is sustained to be a recognized truth of life in the South. This cause led to the start of Civil War.</span>
During the Industrial Revolution, Louis Pasteur established that most diseases are caused by germs and developed a way to kill them (C).
Louis Pasteur was a French biologist that made discoveries about vaccinations, microbial fermentation, and pasteurization (named after him). He is known as one of the fathers of the germ theory and his discoveries have saved many lives.
Wages back then weren't good and families needed the extra paycheck.
Explanation:
Your body is constantly making,and destroying chemical compound, but they are so varid and complex that it's impossible to delect and count them all