The correct answer is B (to add personification to “his essay”
).
Explanation:
When the author says his essay won first place, he was over the moon, which means his essay was really good, so the author is adding personification to his "essay", BY SAYING it was over the moon. This is personification because his "essay" cannot literally jump over the moon. This is not possible, so by saying his essay was really good, comparing it to his essay was over the moon, the second sentence would be more personified than the first one.
