Which parts of the sentences are metaphors?

like if I was saying "oh this homework is a piece of cake" it would be a metaphor because I'm talking about something that is same as "this is easy"

so how to use a metaphor is by saying something that is using the same as the action or word your talking about and then turn it into a phrase like it's raining rocks like it's raining hard and there is a wall in front of my brain like your confused

Kindness is what brings the world to life. Moana showing Te ka kindness and compassion is what led to Te Ka returning back to Te Fiti, the living mother island and restoring the world to it's beautiful and fruitful live. From what I picked up from the movie, and from Maui says it to her, the ocean chose Moana because it missed being sailed on by her people. ... Ocean is her friend. Her grandmother knows that Moana can bring back the lost glory by returning the goddess, Te Fiti, her heart.