Which of the following statements best explains why cities are so densely populated?
a. cities have good airports for traveling.
b. farms are the most densely populated areas of the country.
c. cities have fewer government officials and less police protection than other regions.
d. cities offer a wealth of opportunities for citizens, including jobs, access, education, and healthcare.

Option (d) is the correct answer.

Explanation:

It is known that cities are more developed than villages. This is because cities provide better schools, colleges, life style, job opportunities etc.

Whereas in villages there are schools with improper furniture, classrooms and lack of well trained teachers. As a result, in order to earn a good livelihood people move towards cities.

Therefore, we can conclude that the statement cities offer a wealth of opportunities for citizens, including jobs, access, education, and healthcare, is true.

explanation:

newton's third law, for every action there is an equal and opposite reaction.