carbohydrates fats proteins these organic molecules all have this element in common. This element can form multiple bonds and it bonds with other elements as well as with itself the element is

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i 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.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

density and pressure