When can sentence fragments actually make a piece of writing MORE effective?

In “a dream within a dream which phrase is a context clue to the meaning of grasp ?

Gus needs to purée his soup while it's still in the pot. what is the best tool for him to use?

What motivates lillian jean to tell cassie all her secrets? her feeling of superiority over cassieher feeling that cassie cannot be trustedher need to trick cassie into liking herher need to make cassie feel jealous