Is it true that Early medieval drama originated from the acting-out of liturgical services?

Yes, it is true that early medieval drama originated from the acting-out of liturgical services. These performances began as part of the church's rituals, where biblical stories were dramatized to enhance the worship experience and convey religious teachings to the largely illiterate population. Over time, these liturgical plays evolved into more elaborate forms of theatre, leading to the development of medieval drama as a distinct genre.