Answer:
To promote transcontinental railroads.
Explanation:
The transcontinental railroads were a project made by the United States government and the railroad companies to create one railroad that connected several states to create one large distribution chain,.
The used pamphlets, brochures, and magazines to spread the news about his project.
All of the advertising was made to attract private investors for the project, future consumers, and information about job openings for railroad workers position
The answer is : monocular depth
Monocular depth affect the perception that is held by an individual on<u> how far an object is located based on how big</u> the object look like in that individual's vision.
When the driver cross the railroad, the driver most likely thought that the train is still located far away form him/her because it looks small in the driver's perception. He misjudge it and caused the crash in the end.
Answer: Defense, Travel, and Supply water for farming
Explanation: