The main thing that this question is asking is which sentence does not have a formal tone. A formal tone for research writing usually means using more professional (instead of casual, everyday) language and free of your own opinions.
This means choice D is inappropriate because it is opinionated. Using "I think" is not formal tone.
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Answer: D) I think one of the most frustrating things about owning a cat is that they don't obey many commands.
Hidie's friends name is peter he lives with is grandmother in the village
The authors attitude or tone...
He shows that just being educated and knowing how things work does not mean that you truly and deeply understand and enjoy nature. Scientific explanations remove the magic that nature can have and explaining a star can never be as great as observing stars during a night. That is what Whitman is trying to say.