Respuesta :
The answer is the second one.
Archaeologists and historians have been unable to decipher the Indus Valley writing.
Answer:
Archaeologists believe that the earliest Indus Valley cities were planned because the streets and buildings were created using a grid pattern. Only a well-planned city could have maintained a structured formation during its construction. The two largest cities that have been discovered in the Indus Valley are Harappa and Mohenjo-Daro.