Growth is a

Options

A. Reversible increase in size
B. Reversible increase in shape
C. Irreversible increase in size
D. None of the above.

Answer

### Step-by-Step Solution:

1. **Understanding Growth**:
- Growth in biological terms refers to an increase in size or mass of an organism, organ, or cell.

2. **Irreversibility of Growth**:
- It is important to note that growth is an irreversible process. Once an organism or cell has grown, it cannot return to its original size.

3. **Examples of Irreversible Growth**:
- For instance, when a plant grows, it increases in height, volume, or number of cells. This increase is permanent and cannot be undone.

4. **Reversible Changes vs. Growth**:
- Some changes, such as the swelling of wood during rainy seasons, are reversible. When the wood absorbs moisture, it swells, but when it dries, it returns to its original size. This is not considered growth.

5. **Parameters of Growth**:
- Growth can be measured in various ways, including:
- Increase in length
- Increase in surface area
- Increase in volume
- Increase in the number of cells

6. **Conclusion**:
- Based on the understanding that growth is an irreversible increase in size, the correct answer to the question is that growth is an irreversible increase in the size of an organ or organism.

### Final Answer:
Growth is an irreversible increase in the size of an organ or organism.

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