Which is one characteristic of deep ocean currents? Deep ocean currents move quickly.
Deep ocean currents are caused by winds.
Deep ocean currents move cold water toward the equator.
Deep ocean currents are affected by temperature but not by salinity.

Deep ocean currents are affected by temperature but not by salinity.

Explanation: I think it's this because I know it takes a while for deep ocean currents to move so it isn't the first one.

answer: 4

explanation: 8

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.