Is susie saw seashells at the seaatore an exaple of alliteration or onomatopoeia?

"Susie saw seashells at the sea shore" is an example of alliteration because it has repetition of the same initial sound in close proximity (the 's' sound). Onomatopoeia, on the other hand, is when a Word sounds like the actual sound it is describing, such as "buzz" or "meow."