Not able to understand this question

#1

i am not able to understand the question . which part of the diagram is river.

#2

hey @agarg11 The coordinates given in the question is the river. So do question accordingly with the given coodinates

#3

hey @agarg11 I hope that I was able to clear your doubt.If you still have any just reopen this doubt.
You can give me a rating according to you experience.