Final answer:
A fully activated EOC team, including all personnel from assisting agencies for a major incident, is indicative of a Level 1 activation, which involves full staffing and continuous 24-hour operations.
Step-by-step explanation:
When an EOC team is activated, including personnel from all assisting agencies, to support the response to a major incident or credible threat, this is typically referred to as a Level 1 activation. Level 1 activation represents the highest level of emergency operations center (EOC) mobilization, where all primary and support agencies under the EOC's jurisdiction are activated to respond to the incident. At this level, full EOC staffing is required, and operations are usually carried out 24 hours a day.