Answer: d. all the above are true.
Mining is a process of extraction of valuable minerals and geological materials like fossil fuels, ores from the sub and deeper surface of the earth crust. Country's economy is chiefly dependent upon mining as materials are economically valuable but it affects the local populations in both positive and negative sense.
Mining is a vital part of the economy of surrounding towns : The resources obtained after mining can be sold at high price and can be economically useful for towns.
It introduces pollution into local water supplies : The dust liberate after mining can pollute the nearby water body, hence local water supply will be polluted.
Disrupts local populations of flora and fauna : The mining process involves the removal of the local land form which can cause elimination, migration and extinction of population of flora and fauna species. Hence, the biodiversity of that area is lost.
Therefore, all these situations are true.
