The answer is:
_________________________________________________________
"<span>A. create a scene in the reader's mind."
_________________________________________________________</span>
The Situational Irony that occurred in "The Colomber" by Dino Buzzati was the fact that Stefano gave up his dream of becoming a sea captain to ensure that he will live a long life after seeing the Colomber.
It was believed that the Colomber was a harbinger of Death and that whoever sees it will be doomed for life.
However, the reason why the Colomber was after Stefano was because it was tasked to give Stefano a pearl that will give him good luck and success in life.
It is ironic because the reason Stefano feared the Colomber was false and baseless.
The first one means that you tried to stop feeling nervous or you tried to swallow so much that you couldn't.
The second one means that you are getting more nervous, or anxious.
Hope this was helpful!!!^_^