In the 1920s, what did businesses and industries do that caused the economy to slow down

The correct answer is: "They overproduced goods."

Apart from the financial crash, the intensity of the Great Depression was reinforced due to the simultaneous overproduction crisis.

In a situation of a demand shortage, there is an unsold part of the production. Such unsold items generate losses for the company. If low demand levels persist, companies will be forced to reduce their production and the amount of inputs, including labor. If employment levels are reduced, demand levels decrease further than before.

during both period congress passed law restricting the civil liberties of american citizen that meet with the overall public support is the one statement that explain the rate scare of the 1920 and 1950 is very similar