Files and folders are often hidden for several reasons, including:
- They contain private information.
- Altering them can hurt the computer.
- It creates a cleaner visualization of the file system.
- They are temporary files that the computer will just delete.
However, the most direct reasons are generally that they contain private information or that altering them can affect the system's functionality.
In the context of your question and the provided options, a single correct response could be:
Altering them can hurt the computer.
This highlights the importance of protecting system-critical files and folders from accidental modification or deletion by users.