Q.Explain the classification of industry.

Industry, the production/processing half of business, is classified by how close the activity is to nature. …

Industry -- the branch of business concerned with production, processing, or extraction of goods -- is classified into three broad groups:

1. Primary industries: draw directly on nature. These include extractive industries (mining, fishing, forestry, agriculture), which extract or grow products from the earth, air, or water, and genetic industries (nurseries, animal husbandry, poultry and cattle breeding), concerned with the reproduction and multiplication of living organisms.
2. Secondary industries: work on what primary industries produce. These include manufacturing industries (analytical, synthetic, processing, or assembling), which convert raw material into a finished or semi-finished product, and construction industries, which build roads, bridges, dams, and buildings. …

Students frequently confuse extractive and genetic industries under "primary" -- extractive industries take something out of nature once (mining, fishing), while genetic industries a …