Without system software, system can not run on the other hand without application software, system always runs
A spoofing attack. "<span>a situation in which one person or program successfully masquerades as another by falsifying data, thereby gaining an illegitimate advantage."</span>
Answer: I reduces the size
Explanation: cropped areas of pictures are saved by default, which adds to the file size. If your using PowerPoint then it can reduce the file size by compressing pictures, like lowering their resolution, and deleting cropped areas.