Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

A visual "copy" of an object that is formed by reflected or refracted light is called image.
A visual "copy" of an object that is formed by reflected or refracted light is called what?

Windchill describes what the temperature feels like when the wind is taken into account.
What weather term describes what the temperature feels like when the wind is taken into account?

Drinking straw of these is most flexible.

Which of these is MOST flexible?