Explain the following concepts:
Manufactunng is the orgamsed activity devoted to the transformation of raw materials into marketable goods. In the terminology of economics, these marketable goods are known as economic goods; they cannot be obtained without expenditure. This is in contrast to free goods, which are available in unlimited quantities at no cost. Manufacturing industry is also called a secondary industry, because this is the sector of a nation’s economy that is concerned with the processing of raw matenals supplied by the primary industry (agriculture, forestry, fishing, mining, extraction of minerals, and so on) into the end products. It is one of the most basic and important functions of human activity in modem industrial societies.