A. Christ's crucifixion.
Jesus Christ was supposedly tortured and killed on the cross in Isreal, leading the Latin cross (one central beam with two "arms" on either side, slightly more than halfway up ✝) to become a symbol of Christianity.
The Neolithic Revolution began the era of permanent societies. Due to the closed nature of society, the demographic of farmers was less diverse than the demographic of herders as they mostly mated within their population. Gender roles became more prevalent. The reliance on the limited amount of land they had gave way to political organization. Less variety in terms of food which affected the overall health of the farming society's citizens.
Answer:
Because of their different languages.
