In part two of trifles, which of the following images most reinforces the theme of loneliness that exists throughout the play? the hollow in which the wright home sat the box in which the dead bird was found the partially messy table in the kitchen the broken hinge on the door of the birdcage

I believe the correct answer is the hollow in which the Wright home sat. 
The farmhouse was situated away from the rest of the city, in a hollow where nobody liked visiting. This is why obviously Mrs. Wright had no contact with the outside world. Here's a quote from the text:
Mrs. Hale: I stayed away because it weren't cheerful [...]. I've never liked this place. Maybe because it's down in a hollow and you don't see it from the road. I dunno what it is but it's a lonesome place and always was. (101)

In part two of Trifles, the image that reinforces the theme of loneliness that exists throughout the play is: the hollow in which the Wright home sat.

What is a theme?

A theme is the central point of a text. In the story Trifles, we learn of a woman who was accused of killing her husband, John Wright.

She was characterized as a very lonely woman and this theme was reinforced by the setting of her house which was situated in a hollow.

Learn more about Trifles here:

link

Example support i believe : )