Complete the text with the words from the box. Then press "Check" to mark your answers.
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Man is an animal, for his bodily organs do not differ essentially from those of other mammals, such as sheep, cows, horses, or , but he is the only animal that has invented and can use tools. This is only another way of saying that, while a is physically like many other animals, mentally, he is quite different. Other animals can use only the weapons or tools with which nature endowed them and which are part of their bodies: teeth, claws, stings, legs, wings, fins, etc. But man, whose natural weapons are feeble with those of many animals, has the intelligence and genius to invent tools and weapons, which have made him the master of brute .
For example, a man cannot run very fast or far compared to a deer, horse, or ostrich. But he has discovered the power steam and invented the steam engine, and by its means, he can travel sixty miles an hour. Man's teeth, as cutting instruments, are , and his nails feeble, as compared to the tiger's teeth or the lion's claws. But he has used steel and made knives, swords, spears for himself. Man's arm and fist are feeble weapons compared to the bear's arms, the horse's hoof, or the trunk of the . But he has discovered gunpowder and made himself guns and cannons so that he can kill at a thousand yards and blow up ship fourteen miles away with a shell. Man cannot swim fast or far, but he has invented the rowing boat, the sailing ship, steamer, and the submarine, so that he can cross the water faster than the swiftest fish. Man has no wings, but he has the aeroplane and can now fly faster than the fastest bird. His eyes are weak compared to the eagle's, but he has invented microscope and the telescope. His voice is feeble compared to the roar of the lion or the trumpeting of the elephant, but he invented the telephone and wireless broadcasting, and can now speak to his fellows thousands of miles away. Other animals use tools. So it just a definition to describe man as "a tool-using animal."