A
explanation- The location of Washington state on the west coast of the United States made it a natural hub for transportation and trade, and the presence of seaports and train stations in the region encouraged the growth of cities. Seattle, for example, developed into a major port city due to its location on Puget Sound, which provided access to the Pacific Ocean and made it an important center for shipping and trade. Similarly, the expansion of railroads throughout the state during the late 19th and early 20th centuries helped to connect different parts of the region and facilitated the movement of people and goods, leading to the growth of urban centers along these transportation routes