Which of the following animals can produce ultrasound ?
A) Moths
B) Porpoises
C) Shark
D) Elephant

Options

A. Moths
B. Porpoises
C. Shark
D. Elephant

Answer

To solve the question of which animal can produce ultrasound, we will analyze each option based on our knowledge of animal communication and sound production.

### Step-by-Step Solution:

1. **Understanding Ultrasound**:
- Ultrasound refers to sound waves that have a frequency greater than 20,000 Hz (20 kHz).
- Many animals use ultrasound for communication, navigation, and hunting.

**Hint**: Remember that ultrasound is above the human hearing range.

2. **Analyzing Each Option**:
- **Option A: Moths**:
- Some moths can produce sound, but they primarily use infrasound and audible sounds. They are not known for producing ultrasound.

**Hint**: Consider the common uses of sound in moths; they are not primarily ultrasound producers.

- **Option B: Porpoises**:
- Porpoises are known to produce ultrasound for echolocation. They emit high-frequency clicks that help them navigate and find food.

**Hint**: Think about marine animals that use sound for navigation; porpoises are a key example.

- **Option C: Shark**:
- Sharks primarily rely on their acute sense of smell and electroreception rather than sound. They do not produce ultrasound.

**Hint**: Recall the sensory adaptations of sharks; they are not known for using sound extensively.

- **Option D: Elephant**:
- Elephants can produce infrasound (below 20 Hz) for communication over long distances but do not produce ultrasound.

**Hint**: Elephants are famous for their low-frequency communication, not high-frequency sounds.

3. **Conclusion**:
- After analyzing all options, the only animal that can produce ultrasound is **Porpoises**.

**Final Answer**: The correct answer is **Option B: Porpoises**.