Endemic plants are those which are:

Options

A. Cosmopolitan in distribution
B. Restricted to certain area
C. Found in arctic region
D. Gregarious in habit

Answer

To answer the question regarding endemic plants, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding the Term "Endemic":**
- Endemic plants are species that are native to and restricted to a specific geographical area. They do not naturally occur anywhere else in the world.

2. **Analyzing the Options:**
- The question provides several options:
- A) Cosmopolitan distribution
- B) Restricted to certain area
- C) Found in arctic region
- D) Gregarious in habit

3. **Evaluating Each Option:**
- **Option A: Cosmopolitan distribution** - This refers to species that are found all over the world. This does not apply to endemic plants, which are limited to specific areas. Therefore, this option is incorrect.
- **Option B: Restricted to certain area** - This accurately describes endemic plants, as they are confined to a specific geographical location. This option is correct.
- **Option C: Found in arctic region** - While some endemic plants may exist in the Arctic, the term "endemic" is not limited to any specific region. Thus, this option is incorrect.
- **Option D: Gregarious in habit** - Gregarious plants grow in clusters or patches with other vegetation. This does not define endemic plants, making this option incorrect.

4. **Conclusion:**
- The correct answer is **Option B: Restricted to certain area**, as it best describes the nature of endemic plants.