Indus people were Vedic (Hindu) people. The most ancient scripture - the Vedas, which they follow, give importance to all life forms. Also, the Indus seals carry images of many different animals, such as bulls, tigers, elephants, rhinos, birds, gharials, and so on.
Not all archaeologists are religious. Many archaeologists come from diverse religious backgrounds, and their personal beliefs do not typically affect their work in studying and interpreting ancient civilizations and cultures.
Stuff
Religion is unique to Humans. But all animals have sexual orientation.
The hebrews
Islam is the most important and it will always be extremly important
If you mean: Is it necessary to question the religious beliefs? Yes, It's important to know the major points about the different religious beliefs so that you can choose the best for you, that which satisfies both your mind & heart.
to follow the religious beliefs
Archaeologists often point to the presence of religious symbols, artifacts, and structures in prehistoric city dwellings as signs of religious beliefs. These may include ritual objects, temples or shrines, burial practices, and art depicting deities or spiritual themes. These signs provide insights into the spiritual practices and beliefs of prehistoric populations.
Environment, territorial animals and vegetation, religious beliefs and practices.
because of their contributions to art and literature they are better for religious beliefs
That really depends on religious beliefs and the country you live in.
The importance of handwashing