What theory explains how identical mesosaur dinosaur fossils are found on two different continents, south america and africa?.

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.

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.

answer an inhibitory neurotransmitter in the brain;