Question

1. what sparked the red scare in 1919 and 1920?

Explanation:

The Red Scare of 1919 - 1920 was sparked by a combination of factors. The Russian Revolution in 1917 led to fear of the spread of communism in the US. There were also a series of anarchist bombings in 1919, and labor unrest such as strikes across the country, which were seen by some as part of a communist - inspired plot.

Answer:

The Russian Revolution, anarchist bombings, and labor unrest.