New media is a catch-all term used for various kinds of electronic communications that are conceivable due to innovation in computer technology. In contrast to ‘old’ media, which includes newspapers, magazines, books, television and other such non-interactive media, new media comprises websites, online video/audio streams, emails, online social platforms, online communities, online forums, blogs, internet telephony, web advertisements, online education and much more. It is not very easy to draw a line between the new and old media because the so-called old media has found new ways of representation in digital forms, leaving behind its conventional methods of representation. New media is considered to be the multimedia and digital form of communication happening via desktop and laptop computers as well as phones, tablets and other devices. New media has introduced user interaction, rather than simply consuming media. New media can be customised to users’ preferences and it can be selectively linked from one form of content to another.

What does the term ‘Catch-all’ mean?

The correct answer is A category which includes many different things.

Explanation:
The term catch-all refers to a broad category, label, or term designed to cover a wide variety of different items, concepts, or elements under one general heading.
In the provided passage, the author states: "New media is a catch-all term used for various kinds of electronic communications that are conceivable due to innovation in computer technology." This means that "new media" brings together many diverse forms of digital communication—such as websites, blogs, emails, video streams, online communities, and social platforms—under a single umbrella term.

Analysis of Options:
- A category which includes all the types of media: Incorrect, because a catch-all term does not mean it literally includes every single type of media in existence without exception.
- A category that includes all the sources of information: Incorrect, as the term is not specifically defined by or restricted to information sources.
- A category that includes all the sources of entertainment: Incorrect, because new media encompasses practical and educational communication tools as well, not strictly entertainment.
- A category which includes many different things: Correct, as it accurately defines the meaning of a "catch-all" term that encompasses a wide variety of different items or forms.