Hydroponics is

Options

A. growing plants without soil
B. growing plants in water
C. growing plants without organic matter
D. all of the above

Answer

### Step-by-Step Solution:

1. **Understanding Hydroponics**: Hydroponics is a method of growing plants without soil. It involves growing plants in a nutrient-rich water solution.

2. **Analyzing the Options**:
- **Option A**: "Those plants which are growing without soil" - This is true because hydroponics specifically refers to growing plants without the use of soil.
- **Option B**: "Those plants which are growing in water" - This is also true, as hydroponics utilizes water as the medium for plant growth.
- **Option C**: "Those plants which are growing without organic matter" - This is correct as well, since hydroponics does not rely on organic soil but instead uses a mineral nutrient solution.

3. **Conclusion**: Since all three options A, B, and C are correct, the best answer is:
- **Option D**: "All of the above".

### Final Answer:
**D. All of the above**

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