What did the invention of the steel plow the passage of the Homestead Act in the completion of the Transcontinental Railroad all contribute to?

The invention of the steel plow, the passage of the Homestead Act, and the completion of the Transcontinental Railroad collectively contributed to the westward expansion of the United States in the 19th century. The steel plow facilitated the cultivation of tough prairie soil, enabling settlers to farm more effectively. The Homestead Act encouraged settlement by granting land to individuals willing to cultivate it, while the Transcontinental Railroad improved transportation and connectivity, making it easier for people and goods to move across the country. Together, these developments transformed the American landscape and economy, fostering growth and settlement in the West.