I believe the correct answer is to help the reader visualize a view where water and sky are difficult to tell apart.
The author is trying to portray an image where the water and the sky are somehow blending into each other - you can't tell where one ends and the other one begins, because both items are colored similarly - various shades of blue.
The kind of memory aid the passage "You will be my friend to the very end." is a definition of a word. I hope my answer has come to your help. God bless and have a nice day ahead!<span>
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I am non prejudice in favor or against one group person compared to another
