What does a movement along the demand curve show

Hi my dear friend,

Therefore, a movement along the demand curve will occur when the price of the good changes and the quantity demanded changes in accordance to the original demand relationship. In other words, a movement occurs when a change in the quantity demanded is caused only by a change in price, and vice versa.

~Thank you

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.