How do urban communities compare to rural communities?
a. rural communities produce more pollution than urban communities.
b. urban communities tend to have a higher population than rural communities.
c. more people in the united states live in rural communities than in urban communities.
d. urban communities have less environmental impact than rural communities.

The correct answer is (b) Urban communities tend to have higher population than rural communities

The urban communities tend to have higher population than rural population because of the availability of resources. The people prefer to live in urban areas because they have a better life there in terms of food and shelter. The people from rural communities tend to move from rural area to urban area in search of jobs, and other reasons. All the favorable conditions  make people shift from urban area to rural areas and thus the population of urban communities increases.

d. organisms have cells with different shapes and functions.