Answer:
Disruption of the group relationship.
Step-by-step explanation:
In the scenario above, in as much as the co-worker that has left impacted in the life of those been left, accepting a new person tends to take a toll on them and this is clearly explained to be because of their group relationship.
Without a strong emphasis on relationships, the best thing a small group can do is impart head knowledge. That same knowledge, when discussed in an environment that promotes relationships, has the power to move from the head to the heart. Group members allow that knowledge to impact them, and they seek to apply it. That's when life change happens.