According to Mercutio, the dreams granted by Queen Mab reflect the desires of the individual. Therefore, Queen Mab would make a doctor dream of performing a successful surgery and saving a life because that’s what doctors want to do.
A metaphor for courage might be describing someone as having "the heart of a lion". He does not actually have the heart of a lion, it's a metaphor to show that he is courageous.
In Act 1 Scene 2, Romeo is comforted by Benvolio, who is lovesick over Rosaline. He tries to ease the pain of loving someone that does not love you back. By caring for Romeo, Benvolio supports the archetype of devoted friend.
They are survial tools. For example, the fire is used for warmth and for her bow and arrow when shooting. Another example is the water she uses it to hide and escape quickly during the beginning of the game or uses it as a source of thirst. A final example is the trees she uses them as a way to climb up and scope out the area of where she can go or hide from other players
