This question is based on the following paragraph.

the back yard was covered in late afternoon sunlight. the leaves danced in the trees, delighted that spring had finally arrived. the tulips were bright slashes of color like a child's crayon drawing. in the garden, the first green shoots were pushing out of the soil to greet the warmth of the sun. sitting on the porch swing, i drank in the beauty of nature, a delicious treat.

which phrase from the paragraph is an example of a metaphor?

a. in late afternoon sunlight
b. greet the warmth of the sun
c. delighted that spring had finally arrived
d. the beauty of nature, a delicious treat