A language is a signaling system which operates with symbolic vocal sounds , and which is used by a group of people for the purpose of communication.
Lets look at this __1__ in more detail because it is language, more than anything else, __2__ distinguishes man from the rest of the __3__ world.
Other animals, it is true, communicate with one another by __4__ of cries: for example, many birds utter __5__ calls at the approach of danger; monkeys utter __6__ cries, such as expressions of anger, fear and pleasure. __7__ these various means of communication differ in important ways __8__ human language. For instance, animals cries do not __9__ thoughts and feelings clearly. This means, basically, that they lack structure. They lack the kind of structure that __10__ us to divide a human utterance into __11__.
We can change an utterance by __12__ one word in it with __13__: a good illustration of this is a soldier who can say, e.g., tanks approaching from the north, __14__ who can change one word and say aircraft approaching from the north or tanks approaching from the west but a bird has a single alarm cry, __15__ means danger!
This is why the number of __16__ that an animal can make is very limited: the great tit is a case __17__ point; it has about twenty different calls, __18__ in human language the number of possible utterances is __19__. It also explains why animal cries are very __20__ in meaning.
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