Read the following stanza from a poem by James Whitcomb Riley and answer the question that follows.

"The Days Gone By"

O the days gone by! O the days gone by!
The apples in the orchard, and the pathway through the rye;
The chirrup of the robin, and the whistle of the quail
As he piped across the meadows sweet as any nightingale;
When the bloom was on the clover, and the blue was in the sky,
And my happy heart brimmed over in the days gone by.

Which figurative language device is present in the bolded words?

Allusion
Idiom
Meiosis
Onomatopoeia