Cómo calcular el volumen de un balón, utilizando un hilo de nailon de 50cm​

d i think its   answer d

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.

d. groundwater flows through the subsoil and deposits minerals.

yes, because even though a theory has a  lot of evidence to support it, it is not always true