What do the images of children fields and a setting sun suggest thematically in this verse by Emily Dickinson?

The images of children, fields, and a setting sun suggest themes of innocence, nature, and the passage of time. Children represent purity and youth, fields symbolize growth and abundance, and a setting sun alludes to the end of something or the cycle of life. Together, these images evoke themes of childhood, nature's beauty, and the inevitable march of time.