Backwash and undertow When waves wash up on the beach, the water that is thrown up on to the sand must return to the ocean.
(waves; wash up; L:on the beach) (the water; is thrown; up) (the water that is thrown up on to the sand; must return; to the ocean; T:When waves wash up on the beach)
waves the water the water that is thrown up on to the sand
wash up is thrown must return
L:on the beach
up
to the ocean T:When waves wash up on the beach