Remove action in a parent theme from the child theme

1. How do I override the parent theme function in a child theme?
2. What is the difference between child theme and parent theme?
3. Can you make a child theme of a child theme?
4. What is a parent theme?

How do I override the parent theme function in a child theme?

Functions in your child theme will be loaded before the functions in the parent theme. This means that if your parent and child themes both have functions called my_function() which do a similar job, the one in the parent theme will load last, meaning it will override the one in the child theme.

What is the difference between child theme and parent theme?

A parent theme doesn't need a child theme to work, while the opposite isn't true. A child theme, on the other hand, works as an additional layer on top of the parent theme. It allows your developer to tweak, add, remove an existing WordPress theme without worrying about losing your customizations.

Can you make a child theme of a child theme?

You can't really create a "grandchild" theme in the normal sense - i.e make it the child theme of a child theme.

What is a parent theme?

A parent theme in WordPress is a theme that is declared parent by a another theme, child theme. ... The parent/child theme functionality allows users to easily upgrade their themes without worrying about losing any custom styling that they have added to their site.