Answer: Mountainous terrain forces the air to ascend and facilitates thunderstorm development
Explanation:
The basic composition to forming a thunderstorm; moisture, rising unstable air(air that rises uncontrollable) and a lifting mechanism which provides the nudge, while these are happening, the sun heats up the surface of the earth which warms the aitr above it.
Mountainous terrian forces the air to go up and facilities thunderstorm development