It is to have understanding or knowledge concering a specific matter.
It's first person! Third person is from an outside narrator, 2nd person is the author talking to the reader, and fourth person doesn't exist. :)
NOO!!! Guns should not be permitted in school or on school grounds. In some states, yeah guns are allowed in some schools are the country but it just depends on the state but still, guns shouldn't be allowed no matter the age.
Simile, metaphor, hyperbole, and personification are all types of figurative language.