The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The way in which the community act as a bridge between the past and present generation is the following.
The community serves as a generational bridge because one generation has their culture, ways of living, traditions, customs, points of view, that are passed through the next generation that receives the influence of the past generation belief systems.
The social interaction in the community serves as the conduit to maintain, modify, or totally change those traditions and belief systems that the new generation can decide to use or change, according to social circumstances.