Are many valuable minerals found in or near areas of volcanic activity and mountain building?

I believe the anwser to your question is yes. Where there is volvanic activity there are materials from the core of the earth that are sent to the surface those materials sent to the surface may contain all sorts of minerals. the anwser is most likely yes.

Npnegytthbduhhgvmone

The problem of malnutrition in bangladesh is caused in part by "over population."hope my answer has you : )