Choose one word only from the passage for each answer.Before human arrival, the archipelago's tortoises numbered in the hundreds of thousands. From the 17th century onwards, pirates took a few on board for food, but the arrival of whaling ships in the 1790s saw this exploitation grow exponentially. Relatively immobile and capable of surviving for months without food or water, the tortoises were taken on board these ships to act as food supplies during long ocean passages. Sometimes, their bodies were processed into high-grade oil. In total, an estimated 200,000 animals were taken from the archipelago before the 20th century. This historical exploitation was then exacerbated when settlers came to the islands. They hunted the tortoises and destroyed their habitat to clear land for agriculture. They also introduced alien species-ranging from cattle, pigs, goats, rats and dogs to plants and ants-that either prey on the eggs and young tortoises or damage or destroy their habitat.Originally from mainland South AmericaNumbers on Galapagos islands increased,due to lack of predators 17th century: small numbers taken onto ships used by _____1______.1790s: very large numbers taken onto whaling ships, kept for _____2_____ and also used to produce _____3______.Hunted by _____4______on the islands.Habitat destruction: for the establishment of agriculture and by various ______5____not native to the islands, which also fed on baby tortoises and tortoises'____6_____.