Green house effect is

Options

A. Gardening outside the house
B. Intra species competition
C. Both 1 `&` 2
D. None.

Answer

**Step-by-Step Solution:**

1. **Understanding the Greenhouse Effect**: The greenhouse effect is a natural process that warms the Earth's surface. It occurs when the Sun's energy reaches the Earth, and some of this energy is reflected back to space while some is absorbed and re-radiated by greenhouse gases in the atmosphere.

2. **Identifying Greenhouse Gases**: The major greenhouse gases responsible for this effect include carbon dioxide (CO2), water vapor, and methane. These gases trap heat in the atmosphere, preventing it from escaping back into space.

3. **Analyzing the Options**: The question provides four options to choose from regarding what the greenhouse effect is:
- Option 1: Gardening outside the house
- Option 2: Intraspecific competition
- Option 3: Both one and two
- Option 4: None of the above

4. **Evaluating Each Option**:
- **Option 1**: Gardening outside the house is unrelated to the greenhouse effect. This is a common activity and does not pertain to atmospheric processes.
- **Option 2**: Intraspecific competition refers to competition among individuals of the same species for resources. This concept is also unrelated to the greenhouse effect.
- **Option 3**: Since both options one and two are incorrect, this option is also incorrect.
- **Option 4**: This option states that none of the above options are related to the greenhouse effect, which is true.

5. **Conclusion**: The correct answer is option 4: None of the above. The greenhouse effect is a distinct atmospheric phenomenon that does not relate to gardening or intraspecific competition.