1) Synergy involves working together with others and incorporating their ideas while getting along with them, like two peas in a pod cooperating and creating ideas together.
2) Examples of synergy include two people working together on a project and combining their thoughts, while a lack of synergy is thinking one is always right without listening to others or working independently in a group.
3) The document discusses three approaches to diversity - shunning others who are different, tolerating differences by ignoring them, and celebrating diversity by seeing the advantages of different perspectives working together.