Profession requires specialized knowledge example- doctor, engineer, teacher, advocate etc.

Economic activities can be broadly classified into three categories - primary, secondary, and tertiary. Primary activities involve the extraction of natural resources, secondary activities involve the processing and manufacturing of goods, and tertiary activities involve the provision of services.

One type of economic activity that falls under the tertiary sector is a profession. A profession refers to an occupation that requires specialized knowledge and skills acquired through education and training. Some examples of professions include doctors, lawyers, engineers, architects, and accountants.

Here are some reasons why specialized knowledge is required in a profession:

1. Complexity: Professions involve complex tasks that require specialized knowledge, skills, and expertise. For example, a doctor needs to have a deep understanding of anatomy, physiology, and pharmacology to diagnose and treat patients.

2. Safety: Professions often deal with matters of safety and public interest. For example, an engineer needs to ensure that a building or bridge is constructed safely and meets all the necessary regulations and codes.

3. Ethics: Professions have ethical codes of conduct that require practitioners to act in the best interests of their clients or the public. For example, lawyers have a duty to maintain confidentiality and act in the best interests of their clients.

In conclusion, a profession is an economic activity that requires specialized knowledge because of the complexity, safety, and ethical considerations involved in the work.