Can this be the answer (for raindrops)
Dear student,
The metaphor for raindrops can be - Raindrops the size of dimes.
Quality or feature compared - The size of raindrops are compared to the size of dimes (or coins).
Regards.
The metaphor for raindrops can be - Raindrops the size of dimes.
Quality or feature compared - The size of raindrops are compared to the size of dimes (or coins).
Regards.