In terms of the first question, "They" would be an objective pronoun, but it should be noted that this does not have to be so. for the second, the answer is "my".
I know he stole the necklace
This is best grammar for your sentence
I do believe the answer is b. introductions. why? well because an exposition is where everything is introduced. the characters, the setting, the time, etc.
Five paragraphs including an intro, outright, and 3 body paragraphs with whatever subject.
Answer:
Sherlock Holmes is a detective.
Explanation:
idk
