In ecotoxicology, biomarkers used to indicate an exposure to or the effect of .

i think it is true in my reasonment ..

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

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.