WORLD HISTORY

Detailed explanation-1: -Heavy Industry in India comprises of the heavy engineering industry, machine tool industry, heavy electrical industry, industrial machinery and auto-industry.

Detailed explanation-2: -As a product of mining, various economically valuable products might be obtained, that is, coal, diamond, metallic ores, oil, and so on. Mining industry also involve processes associated with mineral processing, surface mining, market of mining equipment, etc.

Detailed explanation-3: -There are four main methods of mining: underground, surface, placer and in-situ. The type of mining method used depends on the kind of resource that is being targeted for extraction, the deposit’s location below or on the Earth’s surface and the capacity of each method to profitably extract the resource.

Detailed explanation-4: -There are four main mining methods: underground, open surface (pit), placer, and in-situ mining. Underground mines are more expensive and are often used to reach deeper deposits.