Which nims management characteristic allows units from diverse agencies to connect, share information, and achieve situational awareness?

I believe the answer is: Integrated Communications

Integrated communications refers to the concept of communication which utlizes different variety of communications and combine it into one single system. This could be seen in companies that provide their customers with various method to reach their customer service (such as by using phone, social media, or emails)

because the early people found out about it.

answer; degradation ceremony;