Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. the data from his experiment are shown in the table below. what could he have done to increase the validity of his data?

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.