What attractive force holds two hydrogen atoms and one oxygen atom together to make the substance water? a. molecules b. valence electrons c. chemical bonding d. cations

the answer is c.chemical bonding bc its the attraction twords atoms

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.