Amount of heat required to raise the temperature of a body through `1 K` is called its.

Options

A. Water equivalent
B. Thermal capacity
C. Entropy
D. specific heat

Explanation

To solve the question "Amount of heat required to raise the temperature of a body through 1 K is called its...", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept**: We need to identify what is meant by the amount of heat required to raise the temperature of a body by 1 Kelvin. This is a fundamental concept in thermodynamics.

2. **Definition of Thermal Capacity**: The term that describes the amount of heat needed to change the temperature of a body by a certain amount (in this case, 1 K) is known as "thermal capacity".

3. **Clarification of Terms**:
- **Thermal Capacity**: It is the measure of the heat energy required to change the temperature of an object by 1 K (or 1 °C).
- It is important to note that thermal capacity can also be referred to as "heat capacity".

4. **Conclusion**: Based on the definition, the answer to the question is that the amount of heat required to raise the temperature of a body through 1 K is called its **thermal capacity**.

### Final Answer:
The amount of heat required to raise the temperature of a body through 1 K is called its **thermal capacity**.

---