Match each system or term to its corresponding definition. Drag each item on the left to its matching item on the right. balancing feedback reinforcing feedback models sinks flow stock something that responds to the direction of change in a stock by enhancing that same direction of change Press Space to open mechanisms and rates by which a stock changes over time Press Space to open something that counteracts the direction in which a particular stock is changing Press Space to open simplified representations of the real world Press Space to open a supply of something that we want to observe and measure over time Press Space to open places where matter accumulates and is held for long periods of time Press Space to open