What is the principal difference between less developed and more developed countries with regard to the percentages of primary, secondary, and tertiary sector workers?

less developed countries have more primary and secondary workers but less tertiary workers

more developed countries have less primary and secondary workers but more tertiary workers

Explanation:

The principal difference between less developed and more developed countries with regard to the percentages of primary, secondary, and tertiary sector workers is that:

In the three-sector of the economy, the fact holds that countries with higher levels of socio-economic development (developed countries) tend to have less of their economy made up of primary and secondary sectors and more emphasis in tertiary sectors. while the less developed countries tend to have more of their economy made up of primary and secondary workers and less of tertiary sector workers.