Answer:
The spears of sedge around the islet imply that something must be protected.
Explanation:
'The Wild Duck's Nest' is a short story written by Michael Mclaverty. The story is about a little boy, Colm, who ventures in a dense forest and finds a deserted nest of a duck, with an egg in it. The story exhibit the importance of nature and importance of preserving it.
The paragraph 3 of the story contrbutes to the theme of the story of preserving nature by enumerating how islet is protected by spears off sedge, so it is our responsibility to protect the nature.
Therefore, option A is correct.