Read the passage below from The Call of the Wild and answer the question. Charles was a middle-aged, lightish-colored man, with weak and watery eyes and a mustache that twisted fiercely and vigorously up, giving the lie to the limply drooping lip it concealed.
How is the description above an example of foreshadowing?

Charles's age is going to be an issue on the trail.
Charles is going to turn out to lack physical strength.
The word fiercely hints at Charles's capacity for violence.
Charles is less of a man than he thinks he is.