Final answer:
Engaging in activities that stimulate and challenge mental faculties to enhance mental fitness describes the Intellectual dimension of health.
Step-by-step explanation:
The activity that is being described in the question, engaging in activities that stimulate and challenge mental faculties to enhance one's mental fitness, best describes the Intellectual dimension of health according to SAMHSA (Substance Abuse and Mental Health Services Administration). The intellectual dimension focuses on activities that promote cognitive growth, critical thinking, and lifelong learning.
Engaging in activities such as playing chess, reading, solving puzzles, and learning new skills can help to keep the mind sharp and improve mental fitness. These activities stimulate the brain and challenge mental faculties, which in turn enhances mental health and overall well-being.