Answer:
A being with a man's body, without a head, mounted on a horse is what causes confusion to ichabod
Explanation:
When Ichabod leaves the Van Tassels' house, disappointed by Katrina's behavior, he sees a scary creature that causes great confusion and fear for Ichabod, who is a man who is not easily startled, however, he saw a huge, black being who resembled a man, sitting on a large black horse, however, this being did not have its head above its shoulders, but carried it separately from its body. This startled Ichabod to a degree that he was completely confused and bewildered, not knowing what to do.
The whole passage is an example of the authors purpose to persuade, and at least in this case, for a good purpose, which is motivating the reader.
But in the middle of the text, the use of the "evidence" persuasive technique, providing facts of people who overcame challenges, is totally clear.
In the three-way persuasive techniques approach (Ethos, pathos and logos), this historical examples would be evidence of the logos technique (logical knowledge).