Explanation:

The employment sector can be broadly divided into three categories: primary, secondary, and tertiary sectors. The primary sector includes agriculture, mining, and forestry. The secondary sector includes manufacturing and construction, while the tertiary sector includes services such as healthcare, education, and hospitality.

The employment share of each sector can vary depending on the country's economic development and structure. In 2000, the sector with the lowest share of employment was the secondary sector.

Reasons:

There are several reasons why the secondary sector had a lower share of employment in 2000 compared to the other sectors:

1. Shift towards the service sector: Many developed countries had already started to shift towards the service sector, which is less labor-intensive than the manufacturing sector. This shift was due to technological advancements and increasing globalization.

2. Outsourcing: Many companies in developed countries started to outsource their manufacturing activities to developing countries where labor costs were lower. This reduced the demand for labor in the manufacturing sector of developed countries.

3. Automation: The manufacturing sector was becoming more automated, which reduced the need for manual labor.

4. Environmental regulations: Many developed countries had strict environmental regulations, which made manufacturing activities more expensive and less profitable.

Conclusion:

In conclusion, the secondary sector had the lowest share of employment in 2000 due to various reasons such as the shift towards the service sector, outsourcing, automation, and environmental regulations. However, it is important to note that the employment share of each sector can vary depending on the country's economic development and structure.

Beacause in year 2000...most of workforce or people engaged in agricultural sector or primary industry.... occupational structure shows the engagement peole in different activities and industries