Description:

The correct answer is:

✅ Temperature and humidity variations

Why?

Cloud types vary by altitude due to changing atmospheric conditions:

Low Clouds (0–6,500 ft):

Stratus: Form in cool, stable air (drizzle/fog).

Cumulus: Puffy clouds from rising warm air.

Mid Clouds (6,500–20,000 ft):

Altocumulus: Patchy layers in moist, unstable air.

High Clouds (20,000+ ft):

Cirrus: Wispy ice crystals in frigid, thin air.

Key Drivers:

Temperature: Determines if water is liquid or ice.

Humidity: More moisture = denser clouds.

Wind Shear: Shapes clouds (e.g., anvil tops on thunderstorms).

Why Not the Others?

❌ Tectonic plates: Affect geology, not clouds.

❌ Solar radiation: Powers weather but doesn’t directly dictate cloud types.

Fun Fact: No two clouds are alike because air conditions are always shifting! ☁️🌀