How did the geography of Scandinavia encourage the vikings to become skilled sailors?

The geography of Scandinavia, characterized by its extensive coastline, numerous fjords, and archipelagos, provided the Vikings with ample opportunities for maritime exploration and trade. The rugged terrain and harsh winters made agriculture challenging, prompting them to seek resources and new lands through seafaring. Additionally, the proximity to the North Sea and the Baltic Sea facilitated raids and commerce with other cultures. This environment fostered a culture of skilled shipbuilding and navigation, crucial for their voyages.