A technique of taking an audience back in time during the action of a play is called flashback.
B. Overgeneralization
They are saying that "practically every teen cares" but have no real evidence to back that up. They may have polled a small group of teenagers and because the majority of them said they care about animals they generalized that information to represent everyone in the age group. Without a full poll or teens there is no way to know how many do or do not care about the welfare of animals.
The closest one to the actual definition of gloat is the first one...
Answer:
Cricket is a great sport and I am good at it.
