What was happening in the U. S. stock market in the late 1920's? *

“During the late 1920s, the stock market in the United States boomed. Millions of Americans began to purchase stock, causing the market to dramatically increase in value. Unfortunately for the economy, so many Americans invested money in the stock market that stocks became inflated in price.”

Hope this helps.

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !