The correct answer is tunnel.

An infinity mirror is a type of mirror that uses reflective materials to create the illusion of a never-ending tunnel. The built-in lights in the mirror make the illusion even more realistic.

The other options are not as appropriate:

• Lodge is a building that is used for shelter or storage. It would not be accurate to use "lodge" in this context, as an infinity mirror is not a building.
• Funeral is a ceremony that is held for someone who has died. It would not be accurate to use "funeral" in this context, as an infinity mirror is not related to death.
• Signal is a message that is sent from one place to another. It would not be accurate to use "signal" in this context, as an infinity mirror is not used to send messages.