Q. Which is the only Indus city whose citadel and lower town are together surrounded by its city brick walls?
Answer: Lothal
Notes: Lothal, located in modern day Gujarat, India, is the only major Harappan city whose ruins clearly show an outer wall of baked bricks surrounding both its citadel mound and lower town. This indicates organized urban planning with a defensive perimeter wall to protect residents. Given Lothal’s coastal location, the wall provided security and control of river trade access. Uniform organization of housing also indicates governance policies and administration were practiced in Harappan cities over 4000 years ago.