Answer:
Open a text-based editor like Microsoft word, notepad, libraoffice, etc, type the name of the super hero on the first field and the main power on the second field. Then click on the file menu or press ctrl-s and save file as superheroes.dat.
Step-by-step explanation:
The file extension 'dat' is used to hold data for programs, for easy access. The file above holds data in fields separated by a space and has multiple records.