Which mining extracts minerals by panning or dredging minerals like tin and gold?
Alluvial mining is old technology. It is the mining of the flow bed deposit for natural resources. These alluvial deposits are produced when natural resources are tough from their source and then transported by water to a new environment. For example: gold, silver, tin, platinum.
Alluvial mining can be a very simple process. little-scale alluvial pulling out that undertake by person labourer involves digging and sifting through materials such as mud, sand or gravel using shovels, sieves or a labourers bare hands.
Thus, the correct option is A.