Answer:
The final sentence contributes to the end o the article to show we might have fun by doing something one way instead of the other and that we don't know we can enjoy it before doing it.
Explanation:
The sentences are used to point out that sometimes we act based on someone else's thoughts or opinions, and that might be not true. Also, sometimes we can find incredible experiences by trying to achieve our objectives by doing one action instead of others. That there is an infinite amount of probability we can't perceive what could be of value because we have not experienced it.
The frog was hopping mad when his friend pushed him off the lily pad.
I think your answer is "watched debt creep up on them like the tide." I hope this helps.
