The dissolved oxygen level of water in Stream Z was recently tested. It was found to have a DO level of 4 ppm. Is this considered low or high? ANSWER ASAP ANYBODY PLZ PLZ!
due tomorrow (may 20th)

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.

what is the statement?

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this