Why do the rectangular layout of the buildings in Dholavira suggest?

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Explanation:

A huge circular structure on the site is believed to be a grave or memorial,[19] although it contained no skeletons or other human remains. The structure consists of ten radial mud-brick walls built in the shape of a spoked wheel.[19] A soft sandstone sculpture of a male with phallus erectus but head and feet below ankle truncated was found in the passageway of the eastern gate.[19] Many funerary structures have been found (although all but one were devoid of skeletons),[19] as well as pottery pieces, terra cotta seals, bangles, rings, beads, and intaglio engravings.[19]

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