The early sociologist who is best known for his studies pertaining to race (specifically the divisions that existed between blacks and whites) is .

W. E. B. Du Bois

Explanation:

W.E.B .Du is rightly put a Civil Rights Advocate and an African American leader. He is very prominent African American intellectual.

He was notable for doing these;

He was the one singular individual who urged blacks to focus on their education, economic prospect, and work politically for racial equality.

uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs

answer; the cats meowing will temporarily increase, but then it will decrease;