When the author is showing ethos they are showing the characters emotion within the article or story.
Answer:
I think option b also
because as about questions but sure option b
Since a participle takes the form: verb + -ing, the only word in this sentence which has such a form is B, 'challenging'. 'Puzzle' is a noun, 'crossword' is an adjective, 'created' is a verb.
D because it shows he cared for the creature
