What source would be most useful for a persuasive essay with a his thesis a the opinion or next-door neighbor on whether or not he enjoys community services b oh scientific article on of community services c an encyclopedia article from the 1950s on different types of community service d a wedquestion created by elementary school about serving meals to the homeless

I would say a scientific artoclem The neighbour could be anyone, the encyclopedia is out-dated, and children are not a prime source to trust on for community service. In addition, there are more articles and more convincing evidence for your thesis in a scientific.

A good site is "A "Community Fit" Community-Based Participatory Research Program for Family Health, Happiness, and Harmony: Design and Implementation"