Answer: The Operating system is the software which manages and controls the computer's hardware as well as software resources and it also provides the services for the computer program.
An Application software is the software that performs work in which the firms and the users are directly interested in the accomplishing and thought of the places where the user's works are done.
Others are false because,
An operating system supports the single-user tasks, as well as the multi-users tasks and application software, is also supports both tasks.
It depends on whether the writer enjoyed that song at the time when he/she wrote the lyrics I guess. There needs to be more proof to be sure that it is one, because it is a pretty common saying. I'd say yes or no to be on the safe side no.
