Which sentence uses a contraction or possessive form incorrectly? a. i'll hang my poster on their door. b. we're hoping to have ours ready soon. c. ella and rob are still working on they're poster. d. i think it's the best poster in its category.

The answer is C  - it should be "their" not they're. :)

Ifound this on google “what are motifs? a motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. a motif gives clues to theme or reinforces ideas an author wants to emphasize.” i hope this for what your looking for

The answer is !