Main arena of various cellular activities of the cell is_

Answer

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the main area of various cellular activities within the cell.

2. **Understand Cell Structure**: Recognize that a cell consists of different parts, primarily the nucleus and the cytoplasm. The nucleus is responsible for storing genetic information, while the cytoplasm is the area outside the nucleus.

3. **Define Cytoplasm**: The cytoplasm is the gel-like substance that fills the cell and surrounds the nucleus. It is composed mainly of water (H2O) and contains various organelles, enzymes, and other molecules.

4. **Role of Cytoplasm in Cellular Activities**: The cytoplasm serves as the main arena for various cellular activities because:
- It is primarily made up of water, which acts as a solvent for many biochemical reactions.
- It contains enzymes that facilitate numerous metabolic reactions essential for the cell's functions.

5. **Conclusion**: Based on the understanding of cell structure and the role of cytoplasm, we conclude that the main arena of various cellular activities in the cell is the **cytoplasm**.

### Final Answer:
The main arena of various cellular activities of the cell is **cytoplasm**.

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