Answer:
b. Chat
Explanation:
Chat refers to the use of a digital forum where multiple people can communicate with one another by sending text, images, and screenshots to everyone at once. In particular where content is shared with multiple users simultaneously, it is referred to as group chat. There are several chatting applications available from software vendors which can be used for this purpose.
You cant see it can you send a more clear one
<span>GUI is most useful in any program which needs event handling and graphical interface.</span>
The answer would be <span>Sir Tim Berners-Lee.</span>