Based on the text, the skills that support the freedom to choose choice responses (specifically in relation to anger) are:
* Emotional regulation: This is the overarching skill.
* Self-awareness: understanding your own thoughts, feelings, and physical sensations.
* Self-monitoring: Paying attention to your internal state.
* mindfulness: Being present and aware of your experience.
* Self-understanding: Gaining insight into your own patterns and motivations.
* Forgiveness: Letting go of resentment.
* Compassion: Showing kindness to yourself and others.
* Executive functions: (activated by learning these skills) problem solving, planning, decision making, impulse control and moderating social behavior.
Worth a look