The prehistoric people of Bihar likely had beliefs related to all of the above.
Ancestor worship is the belief that the spirits of deceased ancestors can interact with the living. It is a common belief in many cultures around the world, and it is likely that the prehistoric people of Bihar also practiced ancestor worship.
Nature spirits are spirits that are believed to inhabit natural places, such as mountains, forests, and rivers. They are often associated with the forces of nature, such as wind, rain, and thunder. The prehistoric people of Bihar may have believed in nature spirits, and they may have worshipped them or made offerings to them.
Fertility is the ability to produce offspring. It is a vital part of human life, and it is likely that the prehistoric people of Bihar were concerned with fertility. They may have worshipped fertility gods or goddesses, or they may have performed rituals to promote fertility.
In conclusion, the prehistoric people of Bihar likely had beliefs related to ancestor worship, nature spirits, and fertility. These beliefs were likely important to their culture, and they may have played a role in their daily lives.