Answer:
It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors. Over the next several years, consumer spending and investment dropped, causing steep declines in industrial output and employment as failing companies laid off workers.
Explanation:
got it from google LOL
Increase of crops due to new innovations with the farming technique is one that comes to mind, not very sure about other factors though, sorry
Our galaxy contains billions of stars
a nation is a large body of people united by common descent, history, culture, or language, inhabiting a particular country or territory.
My Answer: Most unions excluded blacks, little land ownership opportunities, and also there were no supervisory positions for black men. Black women were mostly servants. They're more examples relating to this topic, if you would like a couple more, let me know.
Hope I helped!:D