What is an example of symbolism in the novel, All the Winters After?

When Nadia returns with Kache to Altai to attempt a reunion with her family, she finds a sea anemone on the beach. When she touches it, its tentacles attach to her finger. When she pulls back, it lets go. This represents the pull of family and the community of Old Believers, and Nadia's release from them which, though it is painful when it occurs, is ultimately what she wants. Later, when she thinks again of the sea anemone, she imagines one tentacle is a different color than the rest, representing her grandmother's disagreement with the rest of the family to banish her from the village.