A) The reason why if you do not properly handle the waste you’ll have chemical and radioactive waste going into your water supply or grounds and slowly might effect your heath or it’ll effect it quickly.
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
I believe the answer would be <span>D.) Abnormal</span>
