Photosynthesis is a

Options

A. Physical process
B. Chemical process
C. Photo-chemical process
D. Physio-chemical process

Explanation

**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, specifically in the form of glucose, using carbon dioxide and water.

2. **Identifying the Type of Process**: Photosynthesis involves multiple types of processes. We need to classify it into one of the following: physical, chemical, photochemical, or physiochemical.

3. **Physical Process**: A physical process involves changes that do not alter the chemical composition of substances. In photosynthesis, there are no significant physical changes occurring in the plant itself, so this option can be ruled out.

4. **Chemical Process**: A chemical process involves changes that result in the formation of new substances through chemical reactions. In photosynthesis, the reactants (carbon dioxide and water) are transformed into glucose and oxygen, indicating that a chemical change occurs. However, this alone does not fully capture the nature of photosynthesis.

5. **Photochemical Process**: This is a specific type of chemical process that involves the absorption of light energy to drive chemical reactions. In photosynthesis, light energy is absorbed by chlorophyll and used to convert carbon dioxide and water into glucose and oxygen. This makes photosynthesis a photochemical process.

6. **Physiochemical Process**: This term refers to processes that involve both physical and chemical changes. While photosynthesis does involve chemical changes, it does not primarily involve physical changes, so this option is not the most accurate.

7. **Conclusion**: Based on the analysis, photosynthesis is best classified as a photochemical process, as it primarily involves the conversion of light energy into chemical energy through chemical reactions.

**Final Answer**: Photosynthesis is a photochemical process.

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