Задание

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Dolphin tricks

Many water parks include shows of dolphins performing tricks. But in 2008, a group of Australian dolphins living in the wild put on a(n) 26) (PERFORM) similar to ones given by dolphins in captivity. Stunned beachgoers saw a group of dolphins walking on the water with their tails, an action serving no apparent purpose. Scientists offer the 27) (EXPLAIN) that the dolphins learnt ‘tail-walking’ behaviour from a group member that spent time in a dolphinarium in the 1980s. Billie, a female in the group, was sent to a dolphinarium for a few weeks to recover from malnutrition. Obviously, she saw others tail-walking there and taught her group the 28) (INTEREST) trick when she was returned to them. 29) (SCIENCE) say it comes as no surprise that dolphins within a group 30) (EASY) learn from each other. What is strange is that these animals seem capable of the cultural 31) (TRANSMIT) of skills and ideas from group to group, just like humans and apes.