Final answer:
In the 'The Sage's Daughter' story, it's the detailed description provided by the author that indicates the river is shallow, such as mentioning the characters crossing the river easily or the visibility of the riverbed.
Step-by-step explanation:
In the story 'The Sage's Daughter' from Panchatantra, we know that the river is shallow due to descriptive details provided by the author. It might be mentioned in the text that the characters easily cross the river or that the river bed can be seen, both of which would indicate a shallow river. These narrative cues provide indirect evidence, aiding us to form a mental image of the river's depth.
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