When matter and energy change forms within a closed system, a. the total amount of energy changes, but the total amount of matter does not. b. the total amount of both matter and energy changes. c. the total amount of matter changes, but the total amount of energy does not. d. the total amount of both matter and energy does not change.

Option D. The total amount of both matter and energy does not change.

Explanation:

From Law of conservation of energy and Einstein's mass-energy relation, we know that, energy neither is formed not is destroyed. It converts from one form to another. Einstein's mass-energy relation: E = mc². It means, Matter is a form of energy i.e. matter holds energy equivalent to product of its mass and square of speed of light. Matter and energy can change forms but the total amount does not change in a closed system. Thus, correct option is D.

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close