Clock : Time :: Thermometer : ?

Options

A. Heat
B. Radiation
C. Energy
D. Temperature

Explanation

To solve the analogy "Clock : Time :: Thermometer : ?", we need to identify the relationship between the first pair of words (Clock and Time) and apply that same relationship to the second pair (Thermometer and ?).

### Step-by-Step Solution:

1. **Identify the relationship in the first pair (Clock : Time)**:
- A clock is a device that measures time.
- Therefore, the relationship can be defined as: "Clock measures Time".

2. **Apply the same relationship to the second pair (Thermometer : ?)**:
- A thermometer is a device that measures temperature.
- Therefore, we can say: "Thermometer measures Temperature".

3. **Determine the answer**:
- Since the thermometer measures temperature, we can conclude that the answer to the analogy is "Temperature".

4. **Select the correct option**:
- Among the given options:
- Option 1: Heat
- Option 2: Radiation
- Option 3: Energy
- Option 4: Temperature
- The correct answer is Option 4: Temperature.

### Final Answer:
The answer to the analogy "Clock : Time :: Thermometer : ?" is **Temperature**.