Which of these lines is an example of personification?

They stretched in never-ending line

Along the margin of the bay

Ten thousand saw I at a glance

Tossing their heads in sprightly dance

Tossing their heads in sprightly dance.

Explanation:

I'd need the passage to know what the author is writing about but I believe this is correct, this or "They stretched in never-ending line"

Personification is taking something non-human and giving human like ways. Like an animal talking or a flower singing.