In this text, we encounter a description of the grasshoppers that are present in Rainy Mountain. The author tells us that these grasshoppers "pop up" like corn. This is meant to describe the way the insects jump out of the grass. By using this simile, the author is able to create a vivid picture of the animals, and thus enrich his description.
The correct answer is "'T is sweet to visit the still wood, where springs." Longfellow's "An April Day" that best describes the mood of this stanza is the line " 'T is sweet to visit the still wood, where springs"
