Falak lists the four events involved in the formation of sinkholes. W - Acidic rainwater dissolves the limestone bedrock. X - Large cavities form in the bedrock. Y - Natural holes and cracks become bigger. Z - The ceiling collapses due to the weight of sediment. Which list shows the correct order of these events in the formation of sink holes? W, X, Y, Z W, Y, X, Z W, Z, Y, X W, Z, X, Y