Questions: The flourishing of African American art, literature, music and activism during the interwar period is often referred to as the Harlem Renaissance

The answer is the Harlem Renaissance: the flourishing of African American art, literature, music, and activism during the interwar period is often referred to as the Harlem Renaissance.

Explanation for each option:

1. Harlem Renaissance: This is the correct answer. The Harlem Renaissance was a cultural, social, and artistic explosion that took place in Harlem, New York, during the 1920s and 1930s. It was a period when African American writers, musicians, and artists gained significant recognition and contributed to the broader American culture. Notable figures include Langston Hughes, Zora Neale Hurston, and Duke Ellington.

2. The "Spirit of St. Louis": This is incorrect. The "Spirit of St. Louis" refers to the custom-built, single-engine, single-seat monoplane flown by Charles Lindbergh on the first solo nonstop transatlantic flight from New York to Paris in 1927.

3. New Deal: This is incorrect. The New Deal was a series of programs and policies implemented by President Franklin D. Roosevelt in response to the Great Depression, aimed at economic recovery and social reform in the United States during the 1930s.

4. Square Deal: This is incorrect. The Square Deal was President Theodore Roosevelt's domestic program, which focused on conservation of natural resources, control of corporations, and consumer protection, and was not related to the cultural movements of the interwar period.