Correct Answer: Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Solution : The correct option is (a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Technological advancements have a significant impact on the demand for different types of labor. The assertion that technological advancements reduce the demand for unskilled labor is true. As technology progresses, tasks that were previously performed by unskilled workers can be automated or replaced by machines, leading to a reduced demand for unskilled labor in those specific areas.

The reason provided states that technological progress increases the demand for skilled labor, which is also true. Technological advancements often require individuals with specialized knowledge and skills to operate, maintain, and innovate upon new technologies. This increases the demand for skilled labor as industries and organizations seek workers who can effectively utilize and adapt to technological advancements.

Overall, technological progress tends to shift the composition of labor demand towards more skilled and specialized roles while reducing the demand for unskilled labor. Therefore, both the assertion that technological advancements reduce the demand for unskilled labor and the reason that technological progress increases the demand for skilled labor are true, and the reason is the correct explanation of the assertion.