Concept:Skilled and unskilled labour are classified by the level of education, training, and special knowledge required for a job.
Explanation:Skilled labour refers to workers who have acquired specialised knowledge and abilities through formal schooling, technical courses, or supervised practical training.
Unskilled labour refers to workers who perform tasks that need little or no formal education and very limited special instruction.
Education and training therefore provide the clearest basis for separating the two groups.
A worker who completes a recognised course or apprenticeship gains technical competence and becomes a skilled labourer.
A worker without such education or training remains an unskilled labourer.
Salaries and wages often differ between skilled and unskilled workers, but pay is only a consequence of the distinction, not the cause of it.
Available resources and level of commitment do not give an objective or reliable way to classify workers, because these factors vary from person to person regardless of skill level.
Thus, the factor that can genuinely be used to differentiate the two categories is the possession of relevant education and training.
Answer:A. Education and training