Question

why do you think that harrapans build walls around their cities

Answer 1

Answer:

yes they built to protect themselves from flood

Answer 2

Answer:

➡The walls were high because they served as retaining walls. ... The walls also served to enclose – to separate parts of cities from one another possibly for reasons of status or community differences, to keep animals in during the night and protect them and the population from raiders, to protect sites from floods, etc.