(e) why is the difference in solar radiation received between 60'n and 30-n greater in summer? in 60"n and 30'n greater in the winter

How do hearths affect cultural diffusion? a. a hearth is the destination of cultural diffusion. b. a hearth divides a cultural region in two. c. a hearth is the beginning point of cultural diffusion. d. a hearth is the means of cultural diffusion. e. a hearth is the meeting point of two diffuse cultures.