Charles darwin observed many species of finches in the galápagos islands. this area is made up of many small islands separated by ocean water. each island has slightly different geography and food sources. name three reasons that this area had a high rate of speciation and explain each in one sentence.

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.