Ingredients of a atmosphere present in minute quantities but essential for maintaining life on earth are

Options

A. Ozone and oxygen
B. Ozone and `CO_(2)`
C. Carbon dioxide and water
D. Carbon dioxide, ozone and water vapours.

Answer

To answer the question regarding the ingredients of the atmosphere that are present in minute quantities but are essential for maintaining life on Earth, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Key Ingredients of the Atmosphere**:
- The atmosphere is composed of various gases, but we need to focus on those that are present in minute quantities yet are crucial for life.

2. **Consider Essential Gases**:
- The primary gases essential for life include Oxygen (O2), Nitrogen (N2), and Carbon Dioxide (CO2). However, we are looking for those present in smaller amounts.

3. **Evaluate the Options**:
- The options provided are:
- Ozone and Oxygen
- Ozone and Carbon Dioxide
- Carbon Dioxide and Water
- Carbon Dioxide, Ozone, and Water Vapours

4. **Analyze Each Option**:
- **Ozone (O3)**: Present in the atmosphere in very small amounts, it plays a critical role in protecting life from harmful UV radiation.
- **Carbon Dioxide (CO2)**: While it is a trace gas, it is vital for photosynthesis in plants.
- **Water Vapours**: Present in varying amounts, they are essential for weather patterns and support life.

5. **Determine the Correct Combination**:
- The combination that includes all three: Carbon Dioxide, Ozone, and Water Vapours, is necessary for life. Each of these components, although present in minute quantities, plays a significant role in maintaining ecological balance and supporting life processes.

6. **Final Answer**:
- The correct answer is **Carbon Dioxide, Ozone, and Water Vapours**.