Which of the following concepts does the image above best illustrate?
a.
city growth is cyclical, and cities with resources continue to grow.
b.
although resources contribute somewhat to city growth, they are not the most important factor.
c.
trade is central to the growth and development of cities.
d.
reasons for city growth are unclear, but workers and resources are important factors.
answer is a

A.City growth is cyclical, and cities with resources continue to grow.

Explanation:

The growth of the cities is cyclical, and in that way is shown how as the demand for supplies goes up, and with that demand, because of the growth of the city is increasing, when the demand is met, the cities can continue to grow, which increases the demand, and then increases the production, that is why is said that is cyclical.