Pisum sativum is a
(a) Climber
(b) Tree
(c) Shrub
(d) Heterotroph

Options

A. Climber
B. Tree
C. Shrub
D. Heterotroph

Answer

To determine the classification of Pisum sativum, we can follow these steps:

1. **Identify the Common Name**: Recognize that Pisum sativum is commonly known as the pea plant.

2. **Examine the Plant Structure**: Observe that the pea plant has soft, green, and pliable stems. This characteristic is crucial in determining its classification.

3. **Understand Growth Requirements**: Note that the pea plant requires support for its growth due to its weak stem. This indicates that it is not self-supporting and relies on external structures to climb.

4. **Differentiate from Other Categories**:
- **Tree**: Trees have hard, woody stems and do not require support, which does not apply to Pisum sativum.
- **Shrub**: Shrubs also have woody stems and are typically more robust than the pea plant.
- **Heterotroph**: Heterotrophs are organisms that cannot synthesize their own food. Since Pisum sativum contains chlorophyll and can photosynthesize, it is not a heterotroph.

5. **Conclusion**: Based on the characteristics and requirements of Pisum sativum, the only fitting classification is that it is a climber.

Thus, the correct answer is (a) Climber.

---