The best response to accurately demonstrate that matter is rearranged and energy is conserved during cellular respiration is:
"Glucose and oxygen breaking into carbon dioxide and water, showing that the mass remains the same and energy is released."
This response correctly illustrates the process of cellular respiration, where glucose (C₆H₁₂O₆) and oxygen (O₂) are converted into carbon dioxide (CO₂) and water (H₂O), while also emphasizing that the total mass of the reactants equals the total mass of the products, thus demonstrating the conservation of mass. Additionally, it mentions energy being released, which accurately reflects what happens during cellular respiration.