Essential element must be absolutely necessary for supporting (A) _____ and (B)_____

Answer

To answer the question regarding what essential elements must be absolutely necessary for supporting, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Essential Elements**: Essential elements are nutrients that plants require for their growth and development. These elements are typically absorbed from the soil and are crucial for various physiological processes.

2. **Identifying Functions of Essential Elements**: Essential elements play significant roles in supporting plant life. They are involved in various functions such as:
- **Growth**: Essential elements contribute to the overall growth of the plant, including cell division and elongation.
- **Development**: They are necessary for the development of different plant structures, such as roots, stems, and leaves.

3. **Reproduction**: In addition to growth and development, essential elements are also vital for the reproductive processes of plants. This includes:
- **Flowering**: Essential elements support the formation of flowers, which are crucial for reproduction.
- **Seed Formation**: They are necessary for the development of seeds and fruits, ensuring the continuation of the plant species.

4. **Conclusion**: Based on the functions of essential elements, we can conclude that they must be absolutely necessary for supporting:
- (A) Normal growth
- (B) Normal reproduction

### Final Answer:
Essential elements must be absolutely necessary for supporting (A) normal growth and (B) normal reproduction.

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