By birth? i think? do you mean like how did they get in a certain caste? because then it would be by birth. but if you mean like what were the castes, i forget.
The answer is A. The Serengeti
Photosynthetic prokaryotes caused aerobic atmosphere during the history of Earth.
Answer:
c: The Sumerians among the first writings of any kind c. 3500 BCE
Explanation:
Sumer or Sumeria is still thought to be the birthplace of slavery, which grew out of Sumer into Greece and other parts of ancient Mesopotamia.
Answer:
D) the Indian Boarding Schools
Explanation:
pls mark brainliest
