Question

Give any four factors necessary for a healthy person.

Answer 1

Health is defined by the World Health Organization as a state of complete physical, mental, and social well-being, rather than simply the absence of disease or infirmity.

Complete answer:
Health is more than just the absence of disease or weakness; it is a state of total physical, mental, and social well-being. That is to say, good health does not only refer to the absence of disease or injury; it also refers to a person's mental, social, and physical well-being.
The environment should be kept clean. Diseases carried by air and water will not spread.
Personal hygiene helps to keep infectious diseases at bay.
Proper, sufficient nutrition and diet are required for a healthy immune system.
Immunization against life-threatening illnesses.
Balanced Diet- To live a healthy life, one must consume a well-balanced diet that includes lots of water.
Exercise on a regular basis—along with proper nutrition and hygiene—is essential for optimal health. Regular exercise and adequate sleep are essential for staying fit, stress-free, and active.

Note:
Types of diseases-
1. Communicable diseases- Infectious disease is a term used to describe illnesses caused by pathogens, which are microorganisms. Individuals are contagious when they get such diseases. Diseases are communicated between species by bacteria, viruses, fungi, and protozoa.
2. Non-communicable diseases are illnesses that cannot be communicated from one person or organism to another. These diseases are the outcome of bad behaviors and a bad lifestyle. It can also be the result of a genetic predisposition or a family history. Cardiovascular disease is an example of a non-communicable disease.