Practice question · Multiple choice
A trait spreading by hierarchical diffusion reaches large cities far apart before the countryside between them. Why does that pattern rule out simple contagious diffusion?
Hints
- Sketch where each model predicts the trait appears SECOND.
- Ask what "near" means in each network.
Show the answer
B. Because jumping between distant cities shows connectivity
Why
The map distinguishes the models. Contagion produces an expanding blot; hierarchy produces distant nodes lighting up out of geographic order, because the links that matter run city to city.
Practise Cultural Geography and Diffusion
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