What are symbols of public recognition awarded for extraordinary heroism or meritorious service?

The correct choice is awards, as these are specifically designed to acknowledge and celebrate extraordinary heroism or meritorious service. Awards can come in various forms, such as medals, ribbons, or trophies, and serve to not only recognize the individual’s accomplishments but also to promote motivation and morale within the organization.

While medals are indeed a type of award given for heroic acts or outstanding service, they represent only one category of the broader term "awards." Promotions refer to advancement in rank or position based on performance and are not directly given as recognition for specific acts of heroism or service. Certificates also serve as a form of recognition but may not carry the same weight or significance as awards that are more publicly acknowledged and celebrated. Thus, awards encompass the entirety of commemorative presentations for acts of extraordinary service or bravery, making it the most accurate descriptor in this context.