The correct answer is: All of the above.
Instant messaging (IM) is a text-based communication medium that allows two or more people to exchange messages instantaneously. It is a form of synchronous communication, which means that both parties are online and able to communicate in real time. IM is often used for personal conversations, but it can also be used for business purposes.
WhatsApp Messenger is a cross-platform instant messaging application for smartphones that uses end-to-end encryption. It is owned by Meta Platforms, formerly known as Facebook. WhatsApp Messenger allows users to send text messages, photos, videos, documents, and voice messages to other users. It also allows users to make voice and video calls.
Skype is a software application for video chat and voice calls. It was originally developed by Skype Technologies and was acquired by Microsoft in 2011. Skype allows users to make free video and voice calls to other Skype users.
It also allows users to make calls to landlines and mobile phones at a low cost.Facebook Messenger is a messaging app developed by Facebook. It allows users to send text messages, photos, videos, and voice messages to other Facebook users. It also allows users to make voice and video calls.
All of these applications are examples of instant messaging. They allow users to communicate with each other in real time.