Answer:
Latin America and Asia.
Explanation:
The immigration policies of the united states were influenced by the public opinion who saw immigrants as a threat to job employment, polluting the cultural identity of the United States. Before the 1960's preference was given to the European immigrants as they were seemed to more civilized however trend changed since the 1960's where Asian and Latin American immigrants have increased considerably. Skilled labor from the Asian countries is in demand In the Unites States. Mexico joining border with the United States provide a secure path to immigrants' entry into the United States.
George Washington was the First historian to write exclusively about the past of the African Americans. He served to be the editor, columnist, lawyer and a prolific writer who tried to bring to light the history of African Americans and their issues of racism and discrimination.
W.E. Dubois was the first historian to explore the African American culture and their integrated lifestyle.
Carter. G .Woodson was known to be the father of Black History. His works aimed to save the rich heritage of the African Americans.
After the emergence of civil rights movement. African Americans proved to be resilient to any kind of oppression and raised their voice for enfranchisement and abolition of racism.
It was a large project that employed many people at several sites across the United States.
Answer: Twentieth century.
Plate tectonics is a scientific theory that describes the movement of plates of the Earth’s lithosphere. The model builds on the concept of continental drift, which proposed that continents had “drifted” relative to each other across the ocean bed. The speculation was first put forward by Abraham Ortelius in 1596. The concept was developed independently by Alfred Wegener in 1912, but the theory was generally rejected.
It was only with the discovery of mid-oceanic ridges in 1947 that the theory began acquiring evidence. Scientists also used devices developed during WWII to study odd magnetic variations across the ocean floor. By 1967, plate tectonics were fully accepted in modern geophysics.
