other with their trunks,making rumbling sounds.The longer they've been separated,the louder and more demonstrative they act when they meet again. C Elephant rumbling is a low,infrasonic sound of 12-20 Hertz(Hz)that humans cannot hear.(Human range is between 20-20,000 Hz.)Researchers have divided this rumbling into three main signals:contact,"Let's go,"and mating.The contact call is used by elephants that are miles away to communicate their location to other herds.All day, female leaders rumble to other groups,who rumble back.They stay far apart to ensure enough food for all the members and later meet at a watering hole and greet each other. D Another type of rumbling is the "Let's go"signal of a head female when she wants to leave a place after drinking or resting.Facing the direction she wants to go,she rumbles until the others begin to answer and follow her.The third type is the mating rumble that a male in musth emits.Females in a herd usually answer him,although none of them may be receptive,because they mate only once every four years.However,when the male hears them,he travels to the group to assess the situation. E A final interesting form of communication among elephants is the way they act toward their dead.If they come upon elephant bones,they stand around touching the skulls and tusks with their trunks.When researchers left the bones of other large animals,like rhinos or buffaloes,in these places,elephants examined them briefly,but they touched only the elephant remains.In India,where elephants are often killed by trains,other elephants come to the scene to caress and mourn the dead ones. Decide whether the following statements are true or false.Write "T"for True and "F"for False on the Answer Sheet. 26.Researchers are studying elephants in order to understand their communication patterns. 27.When female elephants greet each other after a long separation,they rumble and walk away. 28.Elephant rumbling has several meanings. 29.The word emits in paragraph D probably means produces. 30.The word remains in paragraph E is closest in meaning to stays behind. 1368other with their trunks, making rumbling sounds. The longer they've been separated , the louder and more demonstrative they act when they meet again. C Elephant rumbling is a low , infrasonic sound of 12-20 Hertz CHz) that humans cannot hear. C Human range is between 20-20 , 000 Hz.) Researchers have divided this rumbling into three main signals: contact , "Let's go ," and mating. The contact call is used by elephants that are miles away to communicate their location to other herds. All day , female leaders rumble to other groups, who rumble back. They stay far apart to ensure enough food for all the members and later meet at a watering hole and greet each other. D Another type of rumbling is the "Let' s go" signal of a head female when she wants to leave a place after drinking or resting. Facing the direction she wants to go , she rumbles until the others begin to answer and follow her. The third type is the mating rumble that a male in musth emits. Females in a herd usually answer him , although none of them may be receptive , because they mate only once every four years. However, when the male hears them , he travels to the group to assess the situation. E A final interesting form of communication among elephants is the way they act toward their dead. If they come upon elephant bones, they stand around touching the skulls and tusks with their trunks. When researchers left the bones of other large animals, like rhinos or buHaloes, in these places, elephants examined them briefly , but they touched only the elephant remains.ln India , where elephants are often killed by trains, other elephants come to the scene to caress and mourn the dead ones. Decide whether the following statements are true or false. Write "T" for True and "F" for False on the Answer Sheet. 26. Researchers are studying elephants in order to understand their communication patterns. 27. When female elephants greet each other after a long separation, they rumble and walk away. 28. Elephant rumbling has several meanings. 29. The word emits in paragraph D probably means produces. 30. The word remains in paragraph E is closest in meaning to stays behind. 1368