Anxiety over international communication was known as the fear led to new restrictions on Immigration in the United States, ww Spanish American War Red Scare Great Depression

The correct answer is the Red Scare.<br /><br />The Red Scare refers to the fear of communism and the spread of communist ideology that swept through the United States in the aftermath of World War I and the Russian Revolution. This fear led to new restrictions on immigration, as well as the persecution of suspected communists and other left-wing activists.<br /><br />The Spanish-American War, on the other hand, was a conflict between the United States and Spain that took place in 1898, and the Great Depression was a severe economic downturn that occurred in the 1930s. Neither of these events directly led to new restrictions on immigration in the United States.