What is the relationship if Any between thunderstorm frequency and mountainous terrain How do does the frequency of thunderstorms change from north to south over the eastern half of the nation

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

i believe the answer is a or 1

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.