According to Bowen's reaction series, which pink-colored feldspar mineral is most felsic and most stable at the Earth's surface? O Na-rich feldspar
O Ca-rich feldspar
O K-rich feldspar
biotite​

I think last is the correct one but I am not sure

answer: glucoamylase presented optimum activity at temperature of 55â°c, and, in the glycosidic bonds from the non-reducing ends of starch, resulting in the production of glucose. source and type of fermentation can affect the enzyme's properties

credit to kalahira