I believe the answer to this question would be either a metaphor, idiom, or alliteration. But this would most likely be idiom because people can interpret different meanings of this phrase negative or positive and can take it personally or extensively.
Cinco de mayo makes america unique because it celebrates all the Mexicans, another celebration that takes place in america is Hanukkah. these celebrations teach us that there is people that are different and have different beliefs but it’s okay because in the end we always have to be together as one . (hope it helped)
The author is giving a sense of danger with dark clouds and with a gloomy setting.
the purpose of letting her go is so that she can do her best out in the world instead of being cooped up inside