Answer :
Sadness frowned at him is basically saying he was depressed, I believe.
The spider smiling at a fly...well thats exactly what it means. the spider litterally smiled at the fly OR showed the fly his fangs
The spider smiling at a fly...well thats exactly what it means. the spider litterally smiled at the fly OR showed the fly his fangs
The first sentence is a personification and the second sentence is meaning that the spider is hungry and its smiling at the fly. Hope it helps!!