The answer is D
The poet describes the leaves as having a color like blood in the first stanza to add to the murderous answer forbidding tone of the poem. The poem is about a child drowning, and so the word blood foreshadows the dark events later in the poem
The voluntary agreement among individuals by which, according to any of various theories, as of Hobbes, Locke, or Rousseau, organized society is brought into being and invested with the right to secure mutual protection and welfare or to regulate the relations among its members.