Question

fill in the blank: these norms are changing, and such changes often diffuse from a _______, spreading outward as more women enter the paid workforce all around the world. hearth valley border summit

Explanation:

The word "hearth" can metaphorically represent a central or originating point. In the context of norms changing and spreading outward, "hearth" fits as a source from which the change (norms) diffuses. "Valley" is a geographical depression, "border" is a boundary, and "summit" is a peak - none of these convey the idea of a central starting point for diffusion as effectively as "hearth".

Answer:

hearth