Hi Katie,
This is Drew, the first image I have on this post is not my sketch. But it displays what I wanna do with my sculpture. The small chest on the second image is a chest that I own and I want to model over for my octopus to sit on, I think it gives the figure "Grouping". I think the chest gives the octopus some "Containment". Since the chest and the octopus are apart of the same theme which is the ocean, I think it provides "Repetition". Thank you and I would like to hear some feedback!