What weather conditions are typically caused by low pressure systems?

Low pressure systems are associated with rising air, which often leads to the formation of clouds and precipitation. As the air in a low pressure area rises, it cools, leading to condensation and cloud formation. The cooling of air can result in various types of precipitation, such as rain or snow, depending on the temperature and atmospheric conditions. This process contrasts sharply with high pressure systems, which are generally associated with descending air that suppresses cloud formation, leading to clearer skies.

In summary, low pressure systems are typically characterized by cloudiness and precipitation, making this the correct answer.