Identify the characteristic features of plants found in mountains: 1. Trees are tall, straight and thin 2. Leaves have a waxy coating 3. Leaves are narrow and ribbon-like 4. The trees are conical in shape.

Options

A. 1 and 4 only
B. 2 and 3 only
C. 2, 3 and 4 only
D. 1, 2, 3 and 4

Answer

To identify the characteristic features of plants found in mountains, we can analyze each of the given options based on the adaptations of these plants to their environment.

### Step-by-Step Solution:

1. **Tall, Straight, and Thin Trees**:
- Mountain trees often grow tall and straight to reach sunlight in the dense forest. Their thin structure helps them withstand strong winds and reduces the weight of snow accumulation.

2. **Waxy Coating on Leaves**:
- Many mountain plants have leaves with a waxy coating. This adaptation helps to prevent water loss due to the cold and dry conditions at high altitudes. It also allows snow to slide off easily, preventing damage to the leaves.

3. **Narrow and Ribbon-like Leaves**:
- The leaves of mountain plants are often narrow and ribbon-like, resembling needles. This shape reduces the surface area exposed to the cold air, minimizing water loss and preventing snow from accumulating on them.

4. **Conical Shape of Trees**:
- Trees in mountainous regions are typically conical in shape. This shape allows snow to slide off easily, preventing heavy snow accumulation that could break branches. The slanted branches also help in shedding snow.

### Conclusion:
All four statements correctly describe the characteristic features of plants found in mountains:
1. Trees are tall, straight, and thin.
2. Leaves have a waxy coating.
3. Leaves are narrow and ribbon-like.
4. The trees are conical in shape.

Thus, the correct answer is that all four statements are true.