Fill in the blank with an appropriate option.
In this engineering design project you will learn how to build an infinity mirror, with built-in lights that make the mirror look like a deep ______ with no end.

Correct option is A

The correct option to fill in the blank is (a) tunnel.
Explanation: The mirror is described to look deep and endless, which matches the idea of a tunnel (a long hollow passage). (Hindi: सुरंग)
Example: The infinity mirror gave the illusion of an endless tunnel.
Other options:
· (b) Signal – Sign or symbol (संकट या संकेत)
· (c) Funeral – Ceremony for the dead (अंत्येष्टि)
· (d) Lodge – A type of small house or cabin (झोपड़ी)