Lance would like to lose two pounds a week. If his present energy intake is 4,200 kcal a day and his energy expenditure does not change, how many kilocalories should he consume each day to achieve his goal?

b

is correct hope this   also i learnd this in middle school

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.