What is the tone? Here we go again he moaned as he watched the other team score

I would say that his tone makes him sound annoyed ...

Well, this question is actually referring to the tone of the passage which means like, the overall mood of the passage. It is a common mistake to mix it up with the tone of voice, but that isn't what it is referring to.

The tone of this passage I would say is "irritated" and "aggravated" because that's the sort of tone that the author set.