What is a Parent Theme?
When working with WordPress child themes, there’s always a parent theme. It’s the theme that the child inherits its style and functionality from. Any changes to the child theme won’t impact the parent’s code.
More About Parent Themes
The safest way to customize a theme is by using a child theme. A child theme is a theme that inherits the templates, style, and functionality of a parent.
The parent theme can be any that you choose. After creating a child theme, you can make any changes you want to it.
The child theme will work and look just as its parent, aside from the changes you make. Most importantly, you won’t lose these customizations when updating the parent theme.