Photosynthesis is a

Options

A. physical process
B. chemical process
C. physico - chemical process
D. an energy wasting process

Answer

### Step-by-Step Solution:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose or other carbohydrates.

2. **Assessing the Options**:
- **Physical Process**: This involves a change in the state of matter without altering the chemical composition. For example, ice melting into water is a physical change.
- **Chemical Process**: This involves a change in the chemical structure of substances. For instance, burning paper transforms it into ash, which cannot be reverted to paper.
- **Physiochemical Process**: This is a combination of both physical and chemical processes. It involves changes in both the physical state and chemical structure.
- **Energy-Wasting Process**: This implies that energy is lost or not utilized effectively, which is not the case in photosynthesis.

3. **Identifying the Correct Option**:
- In photosynthesis, carbon dioxide and water are converted into glucose and oxygen using light energy. This involves both physical changes (like the opening and closing of stomata) and chemical changes (like the conversion of CO2 into glucose).
- Therefore, photosynthesis is best described as a **physiochemical process** because it involves both physical and chemical transformations.

4. **Conclusion**: The correct classification of photosynthesis is that it is a **physiochemical process**.