Answer:Low-pressure systems form primarily through the processes of conduction and convection.Conduction: Heat from the Earth's surface warms the air above it, causing the air to expand and become less dense. This process allows the heated air to rise.Convection: As warm air rises, it creates a void that cooler, denser air rushes in to fill. This movement establishes a cycle of rising warm air and descending cool air, leading to the development of a low-pressure area.These mechanisms are crucial for weather patterns, influencing wind and precipitation.