Answer:
a. retriever (finder)
Explanation:
In Macintosh computers, the Finder or retriever is a desktop interface. It can be used to find, navigate, open, delete, copy or move files and can open files or folders around the desktop. When the Finder is relaunched, it simply starts the application. It is a method used to return the value of one attributes of an object. It is also called as retriever.
