Complex sentence: The stripes on the palm squirrel's back are explained by a Hindu legend, which has it that a squirrel helped in the construction of the Adi sethu (bridge) at Rameswaram.
Split into simpler sentences: The stripes on the Palm Squirrel's back are explained by a Hindu legend. The legend has it that a squirrel helped in the construction of the Adi sethu (bridge) at Rameswaram.