Answer:(:
Explanation:
The only American president in history to be elected four times
I believe the answer is: increase in food supply and disease immunity.
Prior to 2000 years ago, society experience massive shortage in food supply which cause a lot of people died due to hunger which always keep the population low.
The fact that there is no vaccine also contribute to the low population because it cause a lot of death for infants and children before they grow up.
https://quizlet.com/17421237/ap-govt-midterm-exam-review-flash-cards/
Answer:
The United States is a representative democracy. This means that our government is elected by citizens. Here, citizens vote for their government officials.
Explanation: I took this in 7th grade