Statement 1 : Mammals can eat while breathing.
Statement 2 : Mammals have negative-pressure breath-ing.

Options

A. Both statement 1 and 2 correct.
B. Statement 1 is correct but statement 2 is incorrect.
C. Statement 1 is incorrect but statement 2 is correct.
D. Both statement 1 and 2 incorrect.

Explanation

To analyze the given statements about mammals, we can break down the reasoning step by step.

### Step-by-Step Solution:

1. **Understanding Statement 1: Mammals can eat while breathing.**
- This statement is true. Mammals, including humans, have the ability to eat and breathe simultaneously. This is possible due to the anatomical structure of the throat and the separation of the trachea (windpipe) and esophagus (food pipe).

2. **Understanding Statement 2: Mammals have negative-pressure breathing.**
- This statement is also true. Mammals utilize a mechanism of breathing known as negative-pressure breathing. This involves the diaphragm and intercostal muscles.

3. **Mechanism of Negative Pressure Breathing:**
- When mammals breathe in, the diaphragm contracts and moves downward, while the intercostal muscles contract to lift the rib cage upward. This action increases the volume of the thoracic cavity.
- As the volume of the lungs increases, the pressure inside the lungs decreases, creating a pressure difference between the lungs and the external atmosphere.
- This pressure difference allows air to flow into the lungs, which is essential for breathing.

4. **Conclusion:**
- Both statements are correct. Mammals can eat while breathing due to their anatomical structure, and they employ negative-pressure breathing as their primary method of respiration.

### Final Answer:
Both Statement 1 and Statement 2 are correct.

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