The main function of the stem is

Options

A. Spreading out branches, bearing leaves, flowers and fruits
B. Conduct water, minerals and photosynthates
C. Storage of food, support, protection and of vegetative propagation
D. All of the above

Answer

### Step-by-Step Solution:

1. **Identify the Main Function of the Stem**:
The stem is a crucial part of the plant that develops from the plumule of the embryo of a germinating seed.

2. **List the Functions of the Stem**:
- **Support**: The stem provides structural support to the plant, allowing it to stand upright and hold leaves, flowers, and fruits.
- **Transport**: The stem conducts water and minerals from the roots to the leaves and fruits. It also transports photosynthates (carbohydrates produced during photosynthesis) from the leaves to other parts of the plant.
- **Storage**: The stem can store food and nutrients for the plant.
- **Protection**: The stem can offer protection to the plant against herbivores and environmental factors.
- **Vegetative Propagation**: The stem can give rise to new plants through vegetative propagation, which is the process of asexual reproduction.

3. **Conclude the Main Function**:
Given the various roles the stem plays, it can be concluded that the main function of the stem encompasses all of the above functions: support, transport, storage, protection, and vegetative propagation.

4. **Select the Correct Option**:
Based on the analysis, the correct answer is "all of the above".