Using complete sentences, compare and contrast three aspects of growth in eastern cities and western cities in the united states.

1. The western and Eastern cities developed at a different period. Eastern cities developed in the 1700s and 1800s while the western cities developed in 1900s, which cause some difference in culture.

2. The next one would be the economic difference between the two. Since western cities are developed during the peak of the industrial revolution, the western cities tend to have stronger economic power compared to the eastern cities.

3. The next one would be the structure. To cater the industrialized worker, western cities tend  to have more single-family homes rather than lawns and a center of internet media and technology. The eastern cities, on the other hand, consist of shared housings and mixed neighborhood and  would often used for factories due to its wide area.

D, the answer is letter d. because even though fossil fuels take a very long time to form, they do form in the ground just like coal and others.