Philip Randolph's proposed "March on Washington" in 1941 was going to protest racially discriminatory hiring practices in the defense industry, but was called off after President Franklin D. Roosevelt issued the

Executive Order 8802

Explanation:

Asa Philip Randolph was an American labor unionist and civil rights activist that called for an organized march on Washington DC, to point out the aggressive exclusion of African Americans from jobs in the national defense industry. The threat of the likely gathering of over 100,000 marchers in Washington, D.C compelled President Franklin D. Roosevelt, 32nd president of the United States, to issue Executive Order 8802 that led to the formation of the Fair Employment Practices Commission.

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

the name of the theory is landmass theory.