In which one of the following layers of the atmosphere all weather phenomenon occur ?

The Troposphere is the lowest and densest layer of Earth's atmosphere, extending from the surface to an average height of about 13 km (8 km at the poles and 18 km at the equator). It is the most significant layer for life and meteorology.

• Weather Formation: Almost all weather phenomena, including cloud formation, rainfall, snowfall, storms, and lightning, occur in this layer.
• Water Vapor: It contains approximately 99% of the atmosphere's total water vapor and aerosols, which are the primary drivers of weather changes.
• Temperature Gradient: In the troposphere, temperature decreases with increasing altitude (known as the normal lapse rate). This temperature variation causes air turbulence and convective currents, leading to weather activity.

In contrast, layers like the Stratosphere are relatively stable and free from weather disturbances, which is why jet aircraft typically fly there to avoid turbulence.