Both maturity and avoidance
Maturity because you’re being the bigger person by not retaliating or causing a scene in whatever situation you might be in, and avoidance is more for your own good and your sanity.. just walk away instead of accommodating unnecessary drama
Some times it can be maturity, in a situation when the other party thinks that he or she knows it all.
Avoidance, when you think it’s not necessary for a reply or to allow peace reign.