A second Navy achievement award is indicated by which device?

The correct choice indicates that a gold star is used to denote subsequent awards of a Navy achievement award. Each gold star represents an additional award after the first. This system of stars is a common convention for many military awards to signify multiple achievements; the first award is generally denoted without a star, and subsequent awards use the gold star to indicate the recipient's ongoing excellence and contributions.

The gold star is placed in the ribbon, implying that the service member has received the Navy achievement award more than once, thus showcasing their continued dedication and performance. This distinction is important in recognizing and honoring continuous efforts and accomplishments in service, maintaining the integrity of military recognition standards.