Select the correct words from the drop-down menus to complete the sentence. Metallic bonds are found in bronze between atoms of copper and tin. The atoms of copper, a _ bond with the atoms of tin, a _ to form metallic bonds

rain is the best answer

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.