What all are the major cuisine in western cuisine?

I would hope so!

The style or method of cooking and type of foods that typify a country or region.

Yes.

Kosher simply refers to food that is made following the laws of kashrut (Jewish dietary laws), it is not a style of cooking. Therefore, wherever there are Jews who keep kosher, you will find kosher...

Only cuisines that produce raised baked goods would use baking powder.