The answer is true the homes in the Nile delta were made out of wood.
Labor Law In the United States that outlaws discrimination based on race, color, religion,sex national origin and later sexual orientation and gender identity.
After the slavery was officially abolished in all of the US, the African Americans were quick to move out of the South and migrate massively toward the North. There were several factors as to why this happened. One big factor was that even though the slavery was abolished, the segregation and discrimination continued, so the opportunities in life were very limited. The South was not industrialized, while the North was heavily industrialized, thus the African Americans saw an opportunity to work in the factories instead in the fields. The atmosphere in the North was much better for them, as the majority of the people welcomed them and had no problems with them because of their skin color.
Mexican immigrants were using resources and working jobs that belonged to the white americans.