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

Input: Consider Input: A visual "copy" of an object that is formed by reflected or refracted light is called image.

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


Input: Consider Input: The female reproductive system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus.

Output: What system consists of structures that produce eggs, secrete female sex hormones, and ultimately enable birth of a fetus?


Input: Consider Input: In a medium, the closer the distribution of the material gets to equilibrium state, the slower the rate of diffusion becomes.
Output: In a medium, the closer the distribution of the material gets to what state, the slower the rate of diffusion becomes?