The correct answer to this open question is the following.
If one Amish town started a clothing trend where women were required to wear a symbol on their apron, their trend would diffuse through relocation diffusion.
This new Amish trend would spread to relocation diffusion that means the geographical movement of people from one location to the other. When Amish from one town visits or moves to another town, Amish from that new town is going to notice the change in fashion or new trend and they would be able to decide if they like it and adopt it.
