Monks played several important roles in their local communities, but one of the most significant was that they helped people in need. They often provided assistance to the poor, offered hospitality to travelers, and engaged in agricultural work to support their communities. Monasteries frequently served as centers of learning and healthcare, contributing to the overall well-being of the population.
While they did build churches and participated in religious education, their primary focus was often on serving the community through various forms of charity and support. Therefore, among the options you provided, "They helped people in need" best reflects the critical role monks played in local communities.