Final answer:
Being part of an event involves active participation, while witnessing an event means observing it as an outsider.
Step-by-step explanation:
The difference between being part of an event and witnessing it lies in the level of involvement and experience. When you are part of an event, you actively participate in it and engage with the people and activities involved. For example, if you attend a volleyball club meeting regularly and interact with its members, you are a participant in the event. On the other hand, witnessing an event means observing it as an outsider without actively taking part. You simply observe the event and may document your experience for further reflection and understanding.