a yoga instructor sits cross-legged with eyes closed, slowly inhaling with her chest rising visibly. Her ribcage expands as fresh air fills her lungs completely. She then exhales gently, her shoulders relaxing as the breath flows out naturally. The steady rhythm of her breathing creates a calm, meditative atmosphere. A student nearby mirrors her breathing pattern, learning the proper technique. Small particles of sunlight-filtered air seem to flow around them both. the essential process of breathing, inhaling and exhaling air