Ethos is the rhetoric word used here.
Option (a);
<u>EXPLANATION: </u>
Rhetoric device is a technique of speaking in which one tries to persuade others by their speech. This is done in many ways: Ethos, Pathos, and Logos. Ethos is used to convince the audience of the author's credibility.
The above statement in the question states that the author's argument is supported by the Data received from the United States Environmental Protection Agency and suggests him to believe as a credential person. Thus, it is an Ethos that gives the exact meaning of the above statement.
Answer:
Silently if in exams. Loudly if u r infront ur teacher (IF U DO SO THEN U CAN IMPRESS HIM OR HER)
Answer: it had to be set right
Explanation: cause thats how it work
This shows that he feels like he might have to be in places he isn't supposed to be, or ask questions/have conversations that might seem out of place if he is acting 'normally'. If he is acting crazy, people will be more likely to focus on that rather than what he is doing around the castle.