______ is a free way for brands to feature their product portfolio and tell their brand story to educate and build long-term relationships with shoppers.

The correct answer is Brand Stores because this feature allows brands to create a dedicated space on Amazon to showcase their product portfolio and convey their brand story. By utilizing Brand Stores, companies can educate shoppers about their offerings, highlight unique selling points, and foster long-term relationships with customers through engaging content and an organized shopping experience. In contrast, Freevee is a streaming service that does not focus on brand promotion, while Sponsored Products are paid advertisements designed to boost visibility for individual product listings, making Brand Stores the most suitable option for brands looking to build awareness and connect with shoppers over time.