Can a story have more than 1 theme?

When grendel speaks of unferth and says "i could crush him like a fly" what literary device is being used

Read the sentence: though margo moved as slowly as a snail in the morning, she somehow ended up being the shining star at the corporations breakfast meeting. which phrase from the sentence is an example of the authors use of simile? a) being the shining star b) somehow ended up c)the corporations breakfast meeting d)moved as slowly as a snail

You have 24 hours to sleep, eat, work, and do all your personal tasks. which is the most effective way to do more in your day? a. eat less b. sleep less c. work more d. take more breaks