From chemical consideration, the digestion is basically

Options

A. anabolism
B. hydrogenation
C. hydrolysis
D. dehydrogenation

Explanation

To solve the question regarding the chemical consideration of digestion, we need to analyze the options provided and understand the process of digestion in biochemical terms.

### Step-by-Step Solution:

1. **Understanding Digestion**: Digestion is the process by which complex food substances are broken down into simpler molecules. This is essential for the absorption of nutrients in the body.

2. **Identifying the Process**: The question asks for the chemical nature of digestion. We need to consider the options given:
- **Anabolism**: This refers to the metabolic process that builds larger molecules from smaller ones, which is the opposite of digestion.
- **Hydrogenation**: This is a chemical reaction that involves the addition of hydrogen, typically used in the context of unsaturated fats becoming saturated.
- **Hydrolysis**: This is a chemical reaction where water is used to break down compounds. In digestion, complex carbohydrates, proteins, and fats are broken down into simpler sugars, amino acids, and fatty acids respectively.
- **Dehydrogenation**: This process involves the removal of hydrogen from a molecule, which is not related to digestion.

3. **Analyzing Examples**:
- In the case of carbohydrates, starch is broken down into maltose and then into glucose through hydrolysis, where water is used to break the glycosidic bonds.
- For proteins, they are broken down into polypeptides and then into amino acids through hydrolysis, where water breaks the peptide bonds.

4. **Conclusion**: Since digestion involves breaking down complex molecules into simpler ones using water, the correct answer is **hydrolysis**.

### Final Answer:
The correct option is **option 3: hydrolysis**.

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