Answer this question to the best of your ability:
How does Zen meditation or Zazen differ from mindfulness and concentration-based meditation?
Zazen is a form of seated meditation that originated in Zen Buddhism. It is similar to mindfulness in its focus on being present, however, it differs in that it emphasizes stillness and posture over focusing on the breath or other sensations. Practitioners maintain a stable, alert state of mind without engaging in concentrative efforts. Unlike concentration-based meditation, there's no singular point of focus to concentrate upon, but instead, one meditates in a calm, alert, and spacious awareness.