In April of 1869, George Westinghouse obtained a patent for one of his most important inventions, the air brake.
The mood that is
present almost throughout the story is hopefulness. The main character never
lost sight of his goal, even after facing different challenges, including the
very harsh weather of the desert. He made sure to get all the immigrants safe and alive towards their endpoint.
Answer: 3) I demand that they be punctual.
The answer is a simile. This is because similes compare two things (these things here are his life and the dusty yards) by using like or as (specifically here as).
The other ones don't make sense: nothing is being over exaggerated (hyperbole), there are no repeating consonants (alliteration), and there are no human characteristics being given to inhuman subjects (personification).