To solve the problem, we need to identify the type of chemical reaction in which heat is absorbed.
1. Understanding the Types of Reactions:
- Oxidation reaction: Involves the loss of electrons, often accompanied by the release of heat. It is not a heat-absorbing reaction.
- Exothermic reaction: This type of reaction releases heat into the surroundings.
- Endothermic reaction: In this type of reaction, heat is absorbed from the surroundings to proceed, making it a heat-absorbing reaction.
- Reduction reaction: Involves the gain of electrons, but it does not inherently involve the absorption of heat.
2. Identifying the Correct Answer:
The correct type of reaction that absorbs heat is an *endothermic reaction.
Final Answer:
The correct answer is option (C): Endothermic reaction.