6.
Your Answer is
Correct Answer is G
Explanation
The as in the sentence means "just like", and the content of the comparison before and after is calmness and tenderness (the comparison object is comparable). Hence the F/H error. The underlined part is juxtaposed and watched it peacefully rest. The front part of the sentence should indicate the object it refers to, so the underlined part needs to appear her pet, J error.