how was old harry formed step by step
Old Harry Rocks The chalk of Old Harry Rocks used to be part of a long stretch of chalk between Purbeck and the Isle of Wight, but remained as a headland after large parts of this seam were eroded away. As the headland suffered hydraulic action (a process in which air and water are forced into small cracks by the force of the sea, resulting in enlarging cracks), first caves, then arches formed. The tops of the arches collapsed after being weakened by rainfall and wind, leaving disconnected stacks. One of these stacks is known as Old Harry. Old Harry's Wife was another stack which was eroded through corrosion and abrasion, until the bottom was so weak the top fell away, leaving a stump. Hydraulic action is the main cause of erosion (sheer force of the wave) that damaged the rock and caused it to fall away.
Harry Potter and the Deathly Hallows – Part 2 Voldemort triumphantly announces Harry's apparent death to everyone at Hogwarts, and demands that they all surrender. As Neville gives a defiant response and draws the Sword of Gryffindor from the Sorting Hat, Harry reveals he is still alive, causing the Malfoys and many other Death Eaters to abandon Voldemort as they realize he failed to kill Harry again, and any hope of victory for the Dark Lord is now a lost cause. While Harry battles Voldemort throughout the castle, Neville kills Nagini with the sword, leaving Voldemort vulnerable, and Molly Weasley kills Bellatrix in the Great Hall. Harry and Voldemort's battle ends with Voldemort's own Killing Curse rebounding and killing him, once and for all. After the battle, Harry explains to Ron and Hermione that the Elder Wand had recognised him as its true master because he had disarmed Draco, who earlier had disarmed its previous owner - Dumbledore - but, instead of claiming the Elder Wand, Harry breaks and discards it.