What they are wanting you to do is come up with examples to put there: The kitten was as soft as a blanket. You can probably come up with something better.
While various symbols are connected to grass in this poem, the overall meaning of grass in this poem is that is is used as a metaphor for life. The poem begins referring to grass as God-given, and as a child. The middle of the poem references grass growing, and being a part of all people's lives. The poem then discussed graying hair, and ultimately uses grass as a symbol for death. It follows each stage of life, and shows that grass is universal, and a part of all people's lives, just as life and death are universal.
D.) a dependent clause.
Because the underlined portion cannot stand on its own as a sentence, it is considered a dependent clause.
