Examlex
Which of the following is a wind instrument that usually consists of three or more cups?
Predators
Organisms that hunt and kill other organisms for food.
Psychologists
Professionals who study mental processes and behavior, often helping individuals deal with emotional and mental disorders.
Secondary Reinforcers
Stimuli that have no inherent value but have acquired reinforcing qualities through their association with primary reinforcers.
Coins
Metal pieces issued by a government as money, typically round in shape and used as a medium of exchange for goods and services.
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