Secondary sector jobs are those that involve the transformation of raw materials into finished goods. These jobs typically involve manufacturing and construction activities.

a) Manufacturing:

Manufacturing is a primary example of a secondary sector job. It involves the production of goods on a large scale by processing raw materials. This can include activities such as assembling, fabricating, or refining products. Manufacturing jobs can be found in various industries such as automotive, electronics, food and beverage, textile, and many others. These jobs often require specialized skills and training in operating machinery and equipment to produce goods efficiently and effectively.

b) Construction:

Construction is another example of a secondary sector job. It involves the building, repairing, or renovating of structures such as houses, buildings, roads, bridges, and other infrastructure projects. Construction workers are involved in activities such as excavation, carpentry, plumbing, electrical work, and painting. These jobs require physical labor and often involve working outdoors in different weather conditions. Construction projects are typically carried out by teams of workers who collaborate to complete the project within a specified timeframe.

c) Both (a) and (b):

The correct answer is option 'B' because construction is a secondary sector job, while manufacturing is a primary sector job. Primary sector jobs involve the extraction and harvesting of natural resources, such as mining, farming, or forestry. Secondary sector jobs, on the other hand, involve the processing and transformation of these raw materials into finished goods. While manufacturing is a secondary sector job, it is not the correct answer in this case as the question specifically asks for a secondary sector job, which is construction.

d) None of the above:

Option 'D' is incorrect as both manufacturing and construction are examples of secondary sector jobs. Therefore, the correct answer is option 'B', which identifies construction as the secondary sector job.