Which of the following services, least likely to produce an echo

Question

Styrofoam, wood, glass or stone

Answer 1

Glass is the least likely to produce an echo out of the options provided. Glass is smooth and non-porous, which means sound waves are absorbed rather than reflected back, resulting in a lower chance of producing an echo. Styrofoam, wood, and stone are all more likely to produce echoes due to their more rigid and reflective properties.