The sentence should be structured in a way that starts with the advantage of travelling, followed by what we gain from that advantage (observing people's culture, customs, and lifestyle), and ends with the conclusion that we respect and appreciate their points of view. "R" starts with the advantage of travelling. "P" further elaborates on observing people's behavior. ). "S" follows by what we observe while travelling (culture, custom, lifestyle. "Q" concludes with the result of observing and respecting others' viewpoints.
So, the sentence formed would be: "The advantage of travelling to different places and having the opportunity of observing people's culture, custom and lifestyle, is that we respect and appreciate their point of views."