Final answer:
The true statement is that resources in ICS include available personnel, tools, and equipment for incident assignment. The ICS structure is modular, and communications prefer plain language over codes like 10-codes.
Step-by-step explanation:
The statement that is true is: resources include personnel, tools, and equipment available, or potentially available, for assignment to incidents. The Incident Command System (ICS) is designed to be flexible and modular, meaning that units can be activated as needed, rather than in complete, intact teams.
The intelligence function within ICS is not just limited to national security or classified information; it encompasses all relevant information that assists in incident management. Moreover, while using codes, such as 10-codes, was once common, plain language is now preferred for clarity and to avoid misunderstandings within ICS organizations.