Answer: Interjection
Explanation:
interjection is referred to as a part of speech that shows someone's feelings or emotions. They are usually used alone or placed in sentences. Examples include wow, alas, hey, ouch, oh etc.
The word "hey" is simply an Interjection
that is used to get the attention of someone. From the question, it was used to get the person's attention so that the person can bring the phone.
