Select the most appropriate meaning of the given idiom.

To pay lip service

To express loyalty, respect, or support for something insincerely

The correct answer is option 1. To express loyalty, respect, or support for something insincerely.

The most appropriate meaning of the idiom "to pay lip service" is: To express loyalty, respect, or support for something insincerely

Pay lip service refers to expressing agreement or support for something with words only, but without any real intention of following through with actions. It's essentially a form of insincerity.

Facing a risk, pretending to be old, and ignoring someone all have different meanings and don't relate to the concept of expressing insincere support.