The Food and Agriculture Organization (FAO) of the United Nations guides its global work through a strategic framework aimed at supporting the 2030 Agenda for Sustainable Development. The core organizing principle of this framework is the transformation to more efficient, inclusive, resilient, and sustainable agrifood systems to achieve the "Four Betters".

The "Four Betters" are officially defined as:

1. Better Production: Ensuring sustainable consumption and production patterns.
2. Better Nutrition: Ending hunger, achieving food security, and improving access to healthy diets.
3. Better Environment: Protecting, restoring, and promoting the sustainable use of terrestrial and marine ecosystems.
4. Better Life: Promoting inclusive economic growth and reducing inequalities, leaving no one behind.

The Blue Transformation is a specific FAO vision and programmatic priority area that aims to secure and maximize the contribution of aquatic food systems (fisheries and aquaculture) to achieve these overarching "Four Betters".

Options A, C, and D are incorrect because they include fabricated pillars such as "better ocean", "better coral reefs", "better estuaries", or "better mangrove vegetation", which are not part of the FAO's official strategic framework.

Therefore, Option B is the correct answer.