The correct answer is agriculture. It was made possible for people to live on a single piece of land and not be nomadic anymore in search of food. Agriculture enabled them to settle around river valleys like Nile or Tigris and Euphrates. This is the era when civilizations started rising worldwide.
The thing which was a major factor that threatened the major unity in the United States in the mid-19th century was:
<h3>The Great Depression</h3>
This refers to the period around 1929 in the United States which has a profound effect on the national economy.
This led to the failure of many banks, increase in unemployment and high deflation rates which all threatened the national unity.
Read more about Great Depression here:
brainly.com/question/441267
Answer:
Determining the solution and criteria
Explanation:
Where he's from and what made him known
Answer:
<em>Here is a link to were you can find your answer. ∨ω∨</em>
Link: ↓
https://www.history.com/topics/black-history/brown-v-board-of-education-of-topeka
