Stratosphere is characterised by

Options

A. Fall in temperature with height
B. Lack of water vapours and dust particles
C. Rise in temperature with height
D. Both B and C.

Answer

### Step-by-Step Solution:

1. **Identify the Layer**: The stratosphere is the second layer of the Earth's atmosphere. It extends from the Earth's surface up to about 50 kilometers.

2. **Presence of Ozone Layer**: One of the key characteristics of the stratosphere is the presence of the ozone layer. This layer absorbs harmful ultraviolet (UV) rays from the sun.

3. **Temperature Variation**: In the stratosphere, temperature increases with height. This is contrary to the troposphere (the layer below), where temperature decreases with height.

4. **Air Composition**: The air in the stratosphere is relatively dry. There is a lack of water vapor and dust particles compared to the lower layers of the atmosphere.

5. **Conclusion**: Based on the characteristics discussed:
- The stratosphere is characterized by a rise in temperature with height.
- It has a lack of water vapor and dust particles due to its dry air.

6. **Correct Options**: Therefore, the correct answers regarding the characteristics of the stratosphere are:
- Lack of water vapor and dust particles (Option B).
- Rise in temperature with height (Option C).
- Thus, the correct choice is both B and C.