Software refers to the collection of programs and applications that run on a computer, allowing users to perform various tasks.
- Pen drive is a storage device used to store and transfer data, not software.
- CD (Compact Disc) is a physical storage medium that holds data, including software, but it is not software itself.
- Mouse is a hardware input device used to interact with a computer, not software.
However, MS PowerPoint is a software program used for creating presentations. It is a part of the Microsoft Office suite and is considered an application software. Therefore, the correct answer is MS PowerPoint.