Explanation
Fire altar was from the Harappan period, similar to those at Lothal, not pre-Harappan period.
The lower town was a fortified parallelogram. The Fort was made of mud bricks and three or four structural phases have been recognized. It had north and west gates.
Hydrological evidence suggests the abandonment of the Mature Kalibgan settlement took place on account of drying up of the Saraswati (Ghaggar). This theory was established by the work of Raikes who was Italian Hydrologist and his Indian collaborators.
According to B.B. Lal, the former DG of ASI, the Kalibgan had given the pieces of evidence of the earliest ploughed agricultural field ever revealed through an excavation.
Most Jorwe culture sites were abandoned around 1000 BCE, possibly due to famine or drought, and the remaining sites show signs of increased poverty until their abandonment in c. 700 BCE.
There were no evidence of sudden abandonment, it was a gradual process.
The answer is D as it is not correct.
According to B.B. Lal, the former DG of ASI, the Kalibgan had given the evidence of the earliest plowed agricultural field ever revealed through an excavation.
It shows a grid pattern of furrows, placed about 30 cm apart running east-west and other spaced about 190 cm apart running north-south, a pattern remarkably similar to the one practiced even now. Even today, similar plowing is used for two simultaneous crops in this region, esp. of mustard and gram.
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