¿Qué se entiende por practicar un estilo de vida saludable?

As I'm cannot Spanish, I can answer your question only in English. I hope it helps. You can use translator if you don't understand English.

Como no puedo hablar español, puedo responder su pregunta solo en inglés. Espero que ayude. Puedes usar el traductor si no entiendes inglés.

Your question in English is:

According to World Health Organization (WHO), health can be defined as

"A complete state of mental, physical and social well being not merely the absence of disease"

Practicing a healthy lifestyle can be defined as the having a lifestyle which helps to keep and improve person's health and well being.

Following components comes under practicing a healthy lifestyle

i think its pulmonary not sure tho