What is
Milk is an opaque white fluid which is enriched with fat and proteins produced by mammals for the nourishment of the young ones!
Quark is a type of fresh dairy product, common for the cuisines of German-speaking countries made by warming soured milk until the desired degree of coagulation (denaturation, curdling) of milk proteins is met, and then strained.
Origin
East European countries- Bulgaria, Czech Republic, Ukraine, Southwest Asian countries- Armenia, Azerbaijan, Georgia, Turkey
Germany