Imagine the follwing situation: a newly born animal is brought into a small room. This room has no windows, but artifical light to imitate the sunlight. Furthermore, this light behaves like the sun, so that there are artificial nights and days in the room. The animal will be provided with food and water, too, so that it has enough nutrients to develop in a normal way. What will happen with the animal, when the room is so small, that it would limit the body height of the animal? (One extreme example: an elephant, living in a normal sized room)
Would the growth of the animal be limited by some biological/biochemical mechanism? Or would the animal grow in a more or less normal way?
In summary, my question is: does the body height of an animal depent on its environment? If yes: how strong is this dependence?