In one to two sentences explain why there is more concern for severe storms in low pressure system

Low pressure systems are associated with rising air, which can lead to the formation of thunderstorms, tornadoes, and other severe weather phenomena.+

In one to two sentences, explain how the shorelines can affect weather

Shorelines can affect weather by influencing the movement of winds, as well as creating temperature gradients due to the contrast between land and water, which can lead to the development of sea breezes and localized weather patterns.