Pinus community at Himalayas is an example of:

Options

A. Endemic species
B. Rare species
C. Dominant species
D. Keystone species.

Answer

To determine what type of community the Pinus trees in the Himalayas represent, we need to analyze the characteristics of the Pinus species and the definitions of the options provided.

### Step-by-Step Solution:

1. **Understand the Characteristics of Pinus Trees**:
- Pinus trees are typically tall, ranging from 30 to 50 meters in height.
- They are commonly found in temperate regions, including the Himalayas.
- Their leaves are needle-shaped, measuring about 12 to 18 centimeters long.

2. **Evaluate the Options**:
- **Endemic Species**: These are species that are restricted to a specific geographic area and are not found anywhere else. Pinus is not endemic to the Himalayas as it is also found in regions like eastern Afghanistan, parts of China, and Pakistan.

- **Rare Species**: Rare species are those that are few in number and may be at risk of extinction. Pinus trees are abundant in various regions, so they do not qualify as rare species.

- **Dominant Species**: Dominant species are those that are prevalent in a particular ecosystem and significantly influence its structure. In the Himalayas, Pinus trees are indeed prevalent and form a significant part of the forest community, making them dominant species.

- **Keystone Species**: Keystone species are those that play a critical role in maintaining the structure of an ecosystem. Although important, Pinus trees do not fit this definition as they are not critical to the ecosystem's existence in the way keystone species are defined.

3. **Conclusion**:
- Based on the analysis, the correct answer is that the Pinus community at the Himalayas is an example of **dominant species**.

### Final Answer:
**Dominant species**