What is the output of the code print(dictionary.get("horse", "not found")) if "horse" is a key in the dictionary?

The output of the code print(dictionary.get("horse", "not found")), when "horse" is a key in the dictionary, will indeed be the value associated with the key "horse".

The get() method of a dictionary in Python retrieves the value for a specified key if the key exists. If the key is not present, it returns the second argument given to the method (in this case, "not found"). Since the question states that "horse" is a key in the dictionary, the method will return the value that corresponds to "horse".

If, for example, the value associated with "horse" in the dictionary is "cheval", then that will be printed as the output. Thus, the correct answer is the actual value tied to the "horse" key, which aligns with the output that was indicated.