The ancient Yellow River Valley civilization taught the five relationships as well as the importance of the worship of ancestors in what religion?

The correct answer is 1. Confucianism.

Confucianism, founded by Confucius in ancient China, emphasizes the importance of social relationships, moral values, and ancestor worship. The “five relationships” highlight the duties and responsibilities between father and son, ruler and subject, husband and wife, elder brother and younger brother, and friend and friend. Ancestor worship is a key component, focusing on respect for family lineage and honoring those who came before.