The royal princess of Phaeacia is Queen Arete
Where's the underline? to the problem
A it wouldn’t make sense if you used the other options
Answer: The rider tugged on the <u>rein</u> of her horse to make him slow down.
Explanation: A rein, by definition, means: "A long, narrow strap attached at one end to a horse's bit, typically used in pairs to guide or check a horse while riding or driving."
Therefore, this would be the best term to use in this sentence.