Rocks carried by the river smash together and break into smaller pieces. this process is called abrasion attrition suspension mass wasting

multiplying and dividing the two decimals and the eqations by the same number of the overalls

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.