In Hancock Park, located in the center of Los Angeles, there is a series of asphalt pits called "La Brea Asphalt Pits". For tens of thousands of years, natural asphalt has continuously emerged from underground cracks and formed in the park. Pond. The surface of this asphalt pond is often covered with a layer of water. Animals walk in to drink water, get trapped inside, and eventually drown. Other predators see the trapped animal and try to prey, but they are also trapped inside and unable to extricate themselves. They all turned into a pile of fossils and were preserved, thus forming an animal graveyard. Which of the column statement is consistent with the original? ['The animal graveyard was formed tens of thousands of years ago.', 'Fossils in animal graves are formed by carnivores.', 'The pond in Hancock Park is made of asphalt.', 'The formation of animal graveyards originates from the structure of asphalt ponds.']