it's d I believe hope it's right
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.
She shows that she began to trust when she opens up conversationally about her flowers, and also physically, when she takes off her hat, draws out her hair and invites him beyond the fence.
The first one answer is the correct answer