Which one is not a plant fibre?

Options

A. Coir
B. Flax
C. Hemp
D. Silk

Answer

To determine which option is not a plant fiber, we can analyze the given options one by one:

### Step 1: Identify Coir
- Coir is derived from the outer husk of coconuts. It is a type of fiber obtained from the mesocarp of the coconut fruit.
- **Conclusion**: Coir is a plant fiber.

### Step 2: Identify Flax
- Flax is obtained from the stem of the flax plant, which is known for its blue flowers. The fibers from flax are used to make linen fabric.
- **Conclusion**: Flax is a plant fiber.

### Step 3: Identify Hemp
- Hemp is a fiber obtained from the hemp plant, which is similar to the jute plant. It is used for making various products, including bags and ropes.
- **Conclusion**: Hemp is a plant fiber.

### Step 4: Identify Silk
- Silk is produced by silkworms, which are insects. The silk fibers are obtained from the cocoons of these insects through a process called sericulture.
- **Conclusion**: Silk is not a plant fiber; it is an animal fiber.

### Final Answer
Based on the analysis, the option that is not a plant fiber is **Silk**.

---