What are two reasons we know very little about the Indus valley?

Answer 1

We know very little about the Indus Valley civilization primarily due to the lack of decipherable written records; their script remains undeciphered, making it difficult to understand their culture and society. Additionally, much of the archaeological evidence has been eroded or damaged over time, and many sites remain unexplored or under-researched, limiting our knowledge of their urban planning, economy, and daily life.