What causes increases or decreases in aggregate supply?

Increases or decreases in aggregate supply can be influenced by several factors, including changes in production costs, technological advancements, and resource availability. An increase in aggregate supply may occur due to lower input costs or improved productivity, while a decrease can result from rising costs of raw materials or labor, regulatory changes, or natural disasters that disrupt production. Additionally, changes in the number of firms in a market or shifts in government policies can also impact aggregate supply.