The skill that is being utilized in the given scenario is what is known as selective attention.
This refers to the cognitive process of a person making or giving focus to one aspect or source of information and ignoring the others.
Hence, we can see that based on the given scenario, there is the narration of the class lesson that is going on and contrasting discussions or conversations, and somehow focus is maintained and the class is given priority and this is known as selective attention.
Read more about selective attention here:
https://brainly.com/question/4122584
#SPJ1