The back row; the rear rank in a lineup, seating, or formation.
写真では後列の人たちが少し見えにくい。
In the photo, the people in the back row are a bit hard to see.
卒業アルバムの集合写真では、後列に立つことが多い。
In graduation group photos, people often stand in the back row.
舞台の前列と後列で見え方がかなり違う。
The view is quite different between the front and back rows of the stage.