Hash in Laravel

Question

there. I'm preparing a Laravel test, and there's a question that I think is not correct. When you should use a hash? The available answers are:

• When you want to compress the contents of a file.
• When you want to securely store credit card information so you can use it later.
• When you want to secure sen a password over email.
• When you want to identify the contents of a file without storing the entire file

Since hashing is for encrypting passwords (not to send'em over email) none of this answers seem to be correct. What do you think?