Using the map as a source, which environmental issue can BEST be linked to the population density of Mexico City?

A) Earthquakes
B) Soil erosion
C) Air pollution
D) Endangered species

What effect has mass media had on obesity in the united states a. television commercials and programs have promoted increased acceptance of obesity b. public service announcements have halted the increase in obesity c. educational documentaries have caused obesity in the united states to fall d. advertisments for unhealthy foods have encouraged obesity