How to use "listens" in a sentence

Sentences

Junior looks a bit happier now, and for twenty minutes Owen talks to him about how to hold the gun and how to walk with it, while his son listens carefully and asks sensible questions that show a real interest

And for a while they walk, and he is happy about how carefully Junior holds the gun and how he listens and does exactly what he should

He listens, but everything is quiet in the room