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

There is more concern for severe storms in low pressure systems because these systems create an area of rising air, which leads to instability and the formation of intense weather conditions such as thunderstorms, tornadoes, and hurricanes.

In 1-2 sentences, explain why weather can predicted only as probable, not definite.

Weather can only be predicted as probable and not definite because it is influenced by countless complex factors and variables, making it challenging to accurately forecast every detail with absolute certainty.

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

Shorelines can affect weather due to the differential heating of land and water, causing differences in temperature and air pressure, which in turn can generate sea breezes, coastal fog, and localized precipitation patterns along coastal regions.