Final answer:
An improvement in transportation during the early 1900s includes the development of railroads, construction of roads and canals, and introduction of steamships.
Step-by-step explanation:
An improvement in transportation during the early 1900s was the development of a well-established and extensive system of railroads. Railroads rapidly expanded, covering nearly every corner of the United States by 1890. This form of transportation stimulated growth in various industries and allowed for the efficient movement of both goods and people.
Another improvement was the construction of roads and canals. Paved roads were invented in the 1830s, and a major canal-building boom occurred in the late 18th and early 19th centuries. These transportation networks complemented the railroads and facilitated the movement of goods and people across different regions. Lastly, the introduction of steamships revolutionized maritime transportation. Steamships offered faster and more reliable travel compared to sailing ships, enhancing global trade and connecting people across continents.