Final answer:
a. Freeware is software that can be given away for free, but the author still owns the copyright.Open source software is also free, but it is released with a license that allows users to access, modify, and distribute its source code.
Step-by-step explanation:
The software that can be given away free, but the author still owns the copyright, is called freeware. Freeware refers to software that is available for use and distribution without any cost, but the author retains the rights to the software. Users can download and use the software without paying for it.
Freeware is different from shareware because shareware typically requires users to pay a fee for continued use after a trial period. Public domain software, on the other hand, is software that is not protected by copyright and can be freely used, modified, and distributed by anyone. Open source software is also free, but it is released with a license that allows users to access, modify, and distribute its source code.