Atmosphere is the most concentrate component of air.

Options

A. Oxygen
B. Hydrogen
C. Nitrogen
D. Ozone

Explanation

### Step-by-Step Solution:

1. **Understanding the Composition of Air**:
- The atmosphere is made up of various gases. To determine the most concentrated component, we need to look at the percentages of these gases in the air.

2. **Identifying Major Gases in the Atmosphere**:
- The primary gases in the atmosphere include nitrogen (N2), oxygen (O2), argon (Ar), carbon dioxide (CO2), and trace gases like hydrogen (H2) and ozone (O3).

3. **Analyzing the Concentration of Each Gas**:
- Nitrogen makes up about 78% of the atmosphere.
- Oxygen accounts for approximately 21%.
- Argon is about 0.93%.
- Carbon dioxide is around 0.04%, and other gases are present in even smaller amounts.

4. **Determining the Most Concentrated Component**:
- From the analysis, it is clear that nitrogen (N2) is the most abundant gas in the atmosphere, constituting 78% of the total air.

5. **Conclusion**:
- Therefore, the answer to the question is that nitrogen is the most concentrated component of the atmosphere.