A stenohygrous animal is

Options

A. Cockroach
B. Frog
C. Rat
D. Rabbit

Answer

To determine which of the given options is a stenohygrous animal, let's analyze the term and the options provided.

### Step-by-Step Solution:

1. **Understand the Term "Stenohygrous":**
- Stenohygrous animals are organisms that can only tolerate a narrow range of humidity levels. They are typically found in specific habitats, often associated with freshwater environments.

2. **Examine the Options:**
- The options provided are:
- A) Cockroach
- B) Frog
- C) Rat
- D) Rabbit

3. **Analyze Each Option:**
- **Cockroach:** Cockroaches are generally considered euryhaline, meaning they can tolerate a wide range of humidity and are not stenohygrous.
- **Frog:** Frogs are amphibians that typically live in or near freshwater bodies such as ponds and marshes. They are sensitive to changes in their environment, particularly humidity, making them stenohygrous.
- **Rat:** Rats are mammals that can adapt to various environments and are not limited to a narrow range of humidity.
- **Rabbit:** Rabbits are also mammals and can thrive in various habitats, showing adaptability to different humidity levels.

4. **Conclusion:**
- Based on the analysis, the animal that fits the definition of a stenohygrous animal is the **Frog** (Option B). Frogs are specifically adapted to live in environments with stable humidity levels, making them the correct answer.

### Final Answer:
**B) Frog**