What does circulation do for lakes and ponds.

prevent stratification and bring water to the surface so that it can be exposed to oxygen in the atmosphere.

Explanation:

the statement is true

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.