The dash us used as a summary
Colloquial.
It's not quite informal since it uses more formal words, but it's not formal either.
A. his wife dies, leaving him with a young child.
B. his sister becomes a proper lady.
C. his sister dies.
D. he realizes Heathcliff can ruin his life.
Lockwood comes to Thrushcross Grange to find
A. clues to his past.
B. solitude.
C. friendship.
D. long-lost relatives.
Who saves Hareton's life?
A. Nelly
B. Frances
C. Isabella
D. Heathcliff
How does Cathy and Hareton's relationship differ from Catherine and Heathcliff's relationship?
A. Cathy and Hareton are more vicious during their fights
B. Cathy and Hareton are able to work through their differences
C. Cathy and Hareton marry only for money and status
D. Cathy and Hareton don't truly love each other
This is a metaphor.
Similies use "as" or "like" to explicitly denote a comparison and personifications give human-like characteristics to animals, objects, or concepts.
Hope this helps! :)