Question

As _____ migrated out of fertile river valleys, they spread their culture through _____.

A. animals; breeding
B. tribes; letters
C. people; diffusion
D. families; infusions

Answer 1

Animals have culture?
Tribe writes letters?
Cultural diffusion is the spread of cultural beliefs and social activities from one group to another.
Infusion is the addition of something (such as money) that is needed or helpful