Final answer:
Decentralized control is the information management control category that involves the collection of information from one or more DON components and assigns a control symbol such as a SECNAV, OPNAV, or echelon 2.
Step-by-step explanation:
The information management control category that involves the collection of information from one or more DON components and assigns a control symbol such as a SECNAV, OPNAV, or echelon 2 is called decentralized control.
This control category allows multiple components within the Department of the Navy (DON) to gather and maintain information independently, while still adhering to established control procedures and symbols.
Decentralized control facilitates efficient information sharing and management across different DON components, while ensuring clarity and consistency in identifying and handling the collected information.