Question

what is application and system software

Answer 1

Application and software is similar to each other. But system software is factory installed and application is that you install in your computer or phone later.
And also we know that system software is the mother software of all software. ex. Window OS is mother software and all the child Softwares are VLC.exe , Photoshop.exe etc.

Answer 2

An application, or application program, is a software program that runs on your computer. 

System software is computer software designed to provide a platform to other software. Examples of system software include operating systems like macOS and Windows, computational science software, game engines, industrial automation, and software as a service applications.