After executing the command dictionary["dog"] = "canine", what value will the key "dog" hold?

When you execute the command dictionary["dog"] = "canine", you are assigning the value "canine" to the key "dog" in the dictionary. In Python, a dictionary is a collection of key-value pairs, and the syntax for assigning a value to a specific key involves using square brackets for the key and the assignment operator =.

After the execution of this command, if you were to retrieve the value associated with the key "dog" by using dictionary["dog"], you would find that it returns "canine". This confirms that the value held by the key "dog" is indeed "canine".

The other choices provided do not represent the correct assignment or value for the key "dog" in this context. "dog" is simply the key itself, "chien" is the French translation for dog, and "animal" describes a broader category but does not reflect the specific value assigned to the key. Hence, the correct value for the key "dog" is "canine".