Steady is with constant and delight is with verge and agony.
Answer:
D. He or She
Explanation:
We can figure this out by using the standard order of elimination to see which one of the options makes sense. All of the words except for option D. are either much too vauge, don't make sense, or are grammatically incorrect.
I agree with the person above - I believe the correct answer is A. serenity.
Thoreau was a transcendentalist, which means that he wrote about nature quite a lot. He believed that people should return to living in nature and escape from the concrete cities they were surrounded with in order to find their true selves once again. His description of the pond during the night and day creates a serene and peaceful picture one could relax to.