What is the mainstay of both Norwegian and German agriculture, and the reason why

Norwegian agriculture is dominated by fishing and livestock. Germany is dominated by animal husbandry.

Reason:

Norway leaning into the North Sea, and the North Sea is one of the world's famous fishing grounds, rich in fish, coupled with the fact that fish is the traditional food of the Norwegian nation, fishing has been a long history. As Norway is a country affected by the temperate maritime climate, the pasture here is juicy and suitable for the development of animal husbandry.

Germany is similar to Norway. However, Germany is located in a geographical location less suitable for the development of fisheries.