(a) bus conductor

(a) primary

(b) secondary

• Primary occupations such as animal husbandry, lumbering, etc. are generally required fewer skills to As a result, persons working in these occupations earn less money.
• On the other hand, greater skills are required to perform quaternary occupations such as designing buildings, treating patients, teaching, etc. Therefore, people engaged in these occupations get comparatively high income.

In this way, the type of occupation determines a person’s income.

• Primary occupations require comparatively lesser amount of skills and capital On the other hand, tertiary occupations require comparatively more amount of skills and capital investment.
• In developing countries, the capital formation rate is comparatively low. On the other hand, in developed countries, the capital formation rate is comparatively high.

Therefore, primary occupations are associated with developing countries while tertiary, with developed countries.

• Quaternary services are not of an ordinary nature.
• These services are rendered only by those people who have some special skills/ expertise.

Therefore, quaternary services are not commonly seen.