What does the above chart explain about migration trends?
a. it shows that migration did not start until modern technology was developed.
b. it shows that agricultural societies are the most developed societies.
c. it shows that as human needs and resources change, societies develop differently.
d. it shows that having a strong artistic culture will not increase migration to a region.
select the best answer from the choices provided.

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph