Final answer:
Saucha is the Niyama that focuses on treating the body as a temple.
Step-by-step explanation:
The Niyama's are ethical principles in yoga that guide the practitioner in their journey towards self-discovery and self-improvement. One of the five Niyama's, Saucha, focuses on treating the body as a temple. Saucha encourages cleanliness, both externally and internally, by practicing good hygiene, eating a healthy diet, and engaging in activities that promote physical well-being. By treating the body as a temple, individuals cultivate a sense of respect and reverence for their physical vessel, which is considered essential in the practice of yoga.