The best and most correct answer among the choices provided by the question is the first choice "a grain stack in a natural landscape", it is because structuralism describes the relationship of a single element to a larger, overarching structure.
I hope my answer has come to your help. God bless and have a nice day ahead!
So that products don't break, so they work right, so they are comfortable, they need to be the right size, and to make sure that they don't scratch your work!