Final answer:
Restricted Reporting is the sexual assault victim reporting option that does not trigger an investigation and is only available to Service members and adult military dependents.
Step-by-step explanation:
The type of sexual assault victim reporting option that does NOT trigger an investigation and is only available to Service members and adult military dependents is Restricted Reporting. Restricted Reporting allows a sexual assault victim to confidentially disclose the assault to specified individuals (typically military sexual assault response coordinators, healthcare providers, and victim advocates) without initiating the formal investigative process or notifying command authorities. In contrast, Unrestricted Reporting triggers an official investigation and involves command notification.