Which type of writing do contractions fall into? ex: aren't, can't, haven't question 2 options: formal informal neither both- but more frequently informal

By comparing part 1 and 2 of polar opposites what does it mean by polar opposites

Secret in slovakia how does the author's use of foreshadowing in the opening paragraphs affect the passage? a. it creates excitement by revealing the narrator's hopes of receiving part of her great-aunt's estate. b. it creates dread through its vivid descriptions of the house; readers are aware that something terrible has happened within those walls. c. it creates mystery by suggesting that the narrator's view of the house will somehow change as a result of her experiences inside. d. it creates a sense of joy and anticipation by hinting that the narrator will be reconnected with her great-aunt.

What is the best prediction of the meaning of thrilling based on the context clues?