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Would you like to have a walk after the musical show?

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The correct answer is c. Chemical change.  While both physical and chemical processes can release heat, in the context of standard introductory science multiple-choice questions, the release of heat (or light) is primarily taught as a classic evidence of a chemical change. 

Chemistry LibreTexts  +1 Analysis of the Options: ✅ c. Chemical change: The release of heat (exothermic reaction) is a key indicator that a chemical reaction has occurred, as new bonds are formed that have lower energy than the original bonds. Common examples include combustion (burning) and neutralization. ❌ a. Endothermic change: This is the opposite. An endothermic process absorbs heat from the surroundings, causing them to feel cold. ❌ b. Physical change: While some physical changes (like freezing water or condensation) do release heat, they are usually categorized by a change in state or appearance without forming new substances. In a general testing context, heat release is the hallmark of a chemical change. ❌ d. Reversible change: This describes whether a process can be undone. Many chemical changes that release heat (like burning wood) are actually irreversible. 

Wikipedia  +8 Would you like to see examples of exothermic chemical reactions that you might encounter in your labs?

c. Chemical change

1. Carolina Reaper is the hottest chili pepper in the world.

2. The Earth’s core is hotter than the surface of the Sun.

3. Neptune is the farthest planet in the Solar System.

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