Answer
B) in chemical changes and physical changes.
Explanation
Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change —none is created or destroyed. This concept is called the Law of Conservation of Mass.
Also, the law of conservation of energy states that in any physical or chemical process, energy is neither created nor destroyed. In other words, the entire energy in the universe is conserved.
Therefore, mass and energy are conserved in chemical changes and physical changes.
The correct answer is option B) in chemical changes and physical changes.
