Answer: I believe the answer is personification.
Explanation: Philllis Wheatley's description of mother earth having offspring and nations gazing at scenes are not exaggerations, but rather putting human nature attributes to these objects.
I would say grief because the first thing that comes to mind when I think about its tone would be mournful.
If you look deep into the question, the answer would be telling someone something bad gently but if you were to look light into the question, the answer would just be rain comming down gently