Question

What does "Sadness frowned at him" and "The spider smiled at the fly" means?

Answer 1

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

Answer 2

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!!