One's because One is the subject, so therefore whatever is being talking about, is possessive to them, therefore 's.
Social structure is the system of socioeconomic
stratification such as the the class structure, social institutions and other patterned relations between large social
groups. The key components of social structure include culture, social class,
social status, roles, groups, and social institutions.
Answer:

According to him, the evil practices that dominated the Indian social life were religious intolerance, caste taboos and superstitious practices.
Answer: between 2600 and 2400 B.C.
Explanation: The pyramids of Egypt are one of the greatest feats of engineering in the ancient world because of the technique used in its construction. They were constructed between 2600 and 2400 B.C. They were mainly built as tombs for Egyptian pharaohs and their consorts during the Old and Middle Kingdom periods. The pyramids are one of the oldest ancient structures still standing today.
2 Reasons they had to leave was 1. They were sold to cocasion/white owners and they had to leave, and 2. The cocasion slave owners felt that the a african americans didn't belong so they took them and beat them and stuff like that. (that is cruel man) Happy to Help! :D