a group of students are wandering around a room. when their teacher claps, the students sit down wherever they are.

this situation best models the formation of which type of solid?
1) an amorphous solid because the particles do not have a regular structure
2) an amorphous solid because the motion of the particles stopped
3) a crystalline solid because the moving particles lock into fixed positions
4) a crystalline solid because the particles have a long-range order