Hair are not found in adult whale , its temperature is regulated by :-

Options

A. Sweat glands
B. Blubbers
C. Blood circulation
D. Water

Answer

To solve the question regarding how adult whales regulate their temperature in the absence of hair, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that adult whales do not have hair, and we need to identify how they regulate their body temperature.

2. **Analyzing the Options**: The options provided are:
- A) Sweat glands
- B) Blubber
- C) Blood circulation
- D) Water

3. **Evaluating Each Option**:
- **Option A: Sweat glands** - Whales do not have sweat glands, as they are aquatic mammals and do not sweat to regulate temperature. This option is incorrect.
- **Option B: Blubber** - Blubber is a thick layer of fatty tissue found just beneath the skin of whales. It provides insulation against cold water and helps in temperature regulation. This option is correct.
- **Option C: Blood circulation** - While blood circulation does play a role in thermoregulation, it is not the primary method for whales, especially since they rely on blubber for insulation. This option is incorrect.
- **Option D: Water** - Water itself does not regulate temperature; rather, it is the environment in which the whale lives. This option is also incorrect.

4. **Conclusion**: Based on the analysis, the correct answer is **B) Blubber**. This layer of fat is essential for temperature regulation in adult whales.

### Final Answer:
**B) Blubber**

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