Final answer:
A real-time chat with an online customer service representative is an example of instant messaging.
Step-by-step explanation:
A real-time chat with an online customer service representative is an example of instant messaging. Instant messaging allows for real-time communication with other users over the internet. It is different from email, which is more asynchronous and not real-time. It is also different from SMS or text messaging, which typically refers to communication using mobile phones.