A political party is an organized group of people who have the same ideology, or who otherwise have the same political positions, and who field candidates for elections.
There are two sides of the party- democrats and republicans.
Democrats support voting rights and minority rights, including LGBT rights, multiculturalism, and religious secularism.
Republicans believe that free markets and individual achievement are the primary factors behind economic prosperity. They also believe private spending is usually more efficient than government spending. Republicans generally oppose the estate tax.
Donald Trump is republican and Joe Biden is a Democrat
lack of any plumbing. (people used chamber pots instead of toilets.)
Disease from lack of plumbing and hygiene. (people didn't know they needed to wash their hands)
Dense population not much personal space. Contagious disease spreads easily.
In the early 1900's there were factories in cities that caused lots pollution. Air pollution and water pollution. Both types led to shorter life expectancy and health problems.
The city residents who worked in the factories faced possible death from the dangerous machine conditions. People lost body parts and could burn themselves
C. High Income is the answer, I believe.
Be involved in the political process