`CH_(2)=CH_(2)` is mainly responsible for

Options

A. Formation of internode
B. Formation of nodes
C. Ripening of fruits
D. Formation of internodes

Answer

### Step-by-Step Solution:

1. **Identify the Chemical Structure**: The compound given is CH₂=CH₂, which indicates a double bond between two carbon atoms. This compound can also be represented as C₂H₄.

2. **Recognize the Compound**: The chemical formula C₂H₄ corresponds to ethylene, which is a simple alkene.

3. **Understand Ethylene's Role**: Ethylene is classified as a phytohormone, which means it plays a significant role in plant growth and development.

4. **Main Function of Ethylene**: One of the primary functions of ethylene is to promote the ripening of fruits. This is a crucial process in agriculture and horticulture.

5. **Additional Functions**: Besides fruit ripening, ethylene also influences other growth aspects, such as stimulating transverse growth while inhibiting longitudinal growth.

6. **Conclusion**: Based on the information gathered, the main responsibility of ethylene (CH₂=CH₂) is the ripening of fruit.

### Final Answer:
Ethylene (CH₂=CH₂) is mainly responsible for the ripening of fruit.

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