Environment, housing, employment and nutrition are all factors that affect our quality of life. Health is, however, possibly (41) _most important element. With good health, people can work effectively (42) help people in need - the elderly, the sick and children.

Although having no diseases is very important to be healthy, it is not the only factor. Health is the state of total physical, mental and social well-being. To be healthy, people need to work properly, live in a clean environment (43)......................... includes sanitation and clean water, a balanced diet and adequate rest. In developing countries, diseases are not the only c use of high death rates. Unhealthy or exhausting work, crowded living conditions, too little food and a (44)diet are also prime causes of the numbers of deaths.

Providing basic health care and preventing and treating disease are primary goals today. It is necessary that people should (45)healthcare easily because it is a basic human right.

The word “it” in paragraph 2 refers to .