PLS HELP

Use the following image to answer the question:

The image depicts a series of steps in a diagram. At the top of the diagram is a large horizontal box labeled D. Under D are two columns of boxes. The left column features container A, which points to container B, which points to container C above it. The right column features container F which points to container E. Both C and E point to the large container D at the top of the image.
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Sections A and F in this image represent (1 point)