Choose which aspects of civilization scholars still have questions about for the Indus Valley civilization. Select all that apply.
1. The writing system: Scholars have not been able to fully decipher the script used by the Indus Valley civilization, known as the Indus script. Its language and meaning remain elusive, leaving many questions unanswered.
2. Political organization: The exact political structure and organization of the Indus Valley civilization are still debated among scholars. It is not clear whether it was governed by a central authority or comprised of several independent city-states.
3. Trade and economic systems: While evidence of trade has been found, the exact extent and nature of the Indus Valley civilization's trade network and economic systems are not fully understood. Questions remain about the commodities traded, the routes used, and the economic organization of the civilization.
4. Religious beliefs and rituals: Despite numerous artifacts related to religious practices being found, scholars still have questions about the religious beliefs and rituals of the Indus Valley civilization. The significance of certain artifacts and the role of religion in society are areas of ongoing research.
5. Decline and disappearance: The reasons for the decline and eventual disappearance of the Indus Valley civilization are not definitively known. Scholars have proposed various theories, including environmental factors, such as changes in river patterns, and the possibility of invasions or internal conflicts, but conclusive evidence is still lacking.