A metaphor compares one thing to annother thing, like the example you used. The answer is metaphor.
The correct answers are:
"frequent occasions"
"paltry friendship"
"gossamer fidelity"
Because the narrathor refers to the fragility of the fidelity and the false friendship offered by the man, and that these are frequent occasions . He even give us the reasons to not trust him. And if you are a cat, as Pluto itself, you should be careful with humans around you, because you can't trust them as much as you love them.