He is best known for his work
Richmond, Virginia became the capitol and Jefferson Davis became the president. The answer is D.
An herbivore is an organism that does not depend on others for food
I assume "Muslim belief system" refers to Islam, the religion, not any specific social construct. There are a lot of inherent elements. One is monotheism: there is only 1 god. Another element is the 5 Pillars of Islam, which give guidance on how to live one's life. Hope this helps.