What were the biggest struggles for the average citizen during the renaissance?

Some of the biggest struggle for the average citizen during the Renaissance were:

1. The Black Death- This made 80% of the population die out.

2. Poor people had to work on farms and they couldn't leave the land they had to farm.

3. Citizens were everyone who wasn't a farmer.

4. The social classes were government, citizens, and poor people. The class people got was determined by the job you do, money you get, and if you had any sort of government power, making it hard for poor people to become citizens.

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement