Final answer:
The Student Program Association (SPA) is most likely responsible for the Distinguished Speaker Series at Schwab Auditorium, as it typically falls under the purview of student organizations or departments within a university like Pennsylvania State University.
Step-by-step explanation:
The Distinguished Speaker Series at Schwab Auditorium is an event that features various speakers who are renowned in their respective fields. While specific individuals such as professors or public figures might participate in speaking engagements, the responsibility for organizing and hosting a speaker series typically falls under a particular group or office within the institution. In this case, the correct entity responsible for the Distinguished Speaker Series at Schwab Auditorium is most likely an organization or department associated with Pennsylvania State University, such as the Student Program Association (SPA).
Neither Penn State Thespians, an individual such as 'Abby Wamach,' nor a public figure like Bill Nye the Science Guy would be directly responsible for the administrative organization of a university-wide series like this. They may, however, participate as guests or facilitators within the program. It is essential to check with the specific university's events calendar or contact university offices directly for the most accurate and current information regarding who organizes the Distinguished Speaker Series at a given venue.