Question

auditorium means :
a structure forming the transverse part of a cruciform church
an area of a theater or hall where the audience sits
an automaton that resembles a human being
a device worn in the ear that improves hearing

Explanation:

The word "auditorium" commonly refers to the seating - area for the audience in a theater or hall. The other options describe different things: the transverse part of a cruciform church is a transept, an automaton resembling a human being is an android, and a device worn in the ear to improve hearing is a hearing - aid.

Answer:

B. an area of a theater or hall where the audience sits