It can show you what the speaker is doing and thus you will know why they are doing it. once you know this you will know what to expect in a speech and thus the speech does not work on you as effectively.
Answer: “ An early-morning walk is a blessing for the whole day.”
Yes, I agree that bedbugs are parasites because in the text it states that “bedbugs became even harder to kill” and I can tell that they are parasites because they are hard to kill and they are also doing harm to people when they try sleep or also lay on their beds.