Because megan is annoyed that holly left the kitchen in a mess, she decides to play her stereo loudly when holly is trying to sleep. this is an example of: covert conflict defensive climate acknowledgement overt conflict

The answer is "covert conflict".

Covert conflict is passive aggression most often communicating sentiments about contradictions in an indirect way. For example rebuffing someone else without taking obligation regarding the discipline like in the given case Megan chooses to play her stereo loudly when Holly is attempting to rest.