Answer:
The correct answer is: Amorphous solid
Explanation:
Solid is a state of matter. The constituting particles of a solid are closely packed together and can be arranged in a irregular pattern, thereby forming an amorphous solid; or ordered repeating pattern; which leads to the formation of a crystalline solid.
An amorphous solid is formed by rapid cooling. Therefore, the constituting particles of an amorphous solid lack long-range order and thus have some short-range order.
As in the given example, the randomly moving students sit suddenly at any random place. Therefore, it models the formation of an amorphous solid.
