Answer: metaphor
This is a comparison between two things that doesn’t use “like” or “as”, so it is a metaphor.
Answer:
The purpose of the bobbin is to hold the thread that is held below the needle. The thread from the bobbin goes up through the plate and connects with the top thread to create a sturdy stitch when the machine is in use.
GRACEFULLY is an adverb that modifies the verb “dance”.