INDIAN GEOGRAPHY

Detailed explanation-1: -both (a) and (c) Solution mining and solar evaporation are methods of obtaining salt. Both injection of hot water into ores and evaporating sea water are best ways of mining salt.

Detailed explanation-2: -Solar evaporation in ponds is the oldest method for extraction of minerals such as sodium chloride from seawater and desalination plant concentrate.

Detailed explanation-3: -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. Surface mines are typically used for more shallow and less valuable deposits.

Detailed explanation-4: -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-5: -Open-pit mining Open-pit is one of the most common mining methods used and starts from the earth’s surface, maintaining exposure to the surface throughout the extraction period.