The low arousal approach is a way to help people who are feeling upset or angry to calm down and feel better. It uses gentle techniques that don't make them feel more agitated, like talking in a quiet voice, using soft lighting, not making sudden movements, and giving them space to relax.
Imagine you got really upset because someone took your toy without asking. You might feel like yelling or hitting them. But if someone spoke very calmly and said something like, "I can see you're upset. Let's take a deep breath together and talk about how we can solve this problem," you might feel better and not want to yell or hit anymore.
The low arousal approach is like taking a deep breath and calming down before reacting to something that makes you upset. It helps you stay in control and feel more peaceful instead of getting more upset.