Which of the following contributed to the growth of farms in the United States during the 1960s? -improved flow of materials
-pesticides from co-ops
-mergers in agribusiness
-demand for organic foods

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.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it