The rotational period of the moon

1. greater than the revolution period around earth
2. equal to the revolution period around earth
3. always changing
4. less than revolution period around earth

i need an image of the diagram

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.