Please answer the following question: I know that the answer to the question "what did the skills becoming mainstays lead to?" is in "Much of the Alpine culture is unchanged since the medieval period when skills that guaranteed survival in the mountain valleys and in the highest villages became mainstays, leading to strong traditions of carpentry, woodcarving, baking and pastry-making, and cheesemaking.". Can you tell me what it is?
A:
strong traditions