what version of the internet do we use as an interactive social system in which users are able to interact with senders

Web 2.0

Explanation:

The web is a vast communication of wired and wireless interconnected devices. Users source for data on the web and communicate with each remotely, from their personal devices.

Web 2.0 is a current version of the internet, known to be participation oriented, promotes social interactions, in which users are able to interact and collaborate with senders. It is based on a user data generation based website and specifies only the design and use of these websites rather than the technical aspect of web development.