Final answer:
A desire to expand or build on humorous comments made by others is the characteristic seen in humor at staff meetings of governmental or non-profit organizations.
Step-by-step explanation:
According to studies, a characteristic seen in humor at staff meetings of governmental or non-profit organizations is a desire to expand or build on humorous comments made by others. This means that individuals in these meetings often contribute to the humor by adding on to or elaborating on humorous remarks made by their colleagues. This helps create a positive and lighthearted atmosphere during these meetings.