It would be C. Informal because you are suppose to start business letters with Dear (Yourname) and it's the only one that does.
Literal language means exactly what it says, while figurative language uses similes, metaphors, hyperbole, and personification to describe something often through comparison with something different. See the examples below.
Answer:
John Boyne (born 30 April 1971) is an Irish novelist. He is the author of eleven novels for adults and six novels for younger readers. His novels are published in over 50 languages. His 2006 novel The Boy in the Striped Pajamas was adapted into a 2008 film of the same name.
