If a system is isolated, the total energy of the system if a system is isolated, the total energy of the system depends on the work into the system. increases constantly. depends on the work out of the system. is constant. decreases constantly.

Is constant.

Explanation:

Isolated systems cannot exchange energy or matter outside the borders of the system.

their crystal patterns have been disrupted by stress

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.