Read the sentence from the passage.
"outfitted in their bathing suits' and suspended on a mechanical wave simulator that moves them in circles, the
turtles 'swim' - without any water! " (paragraph 16)
what does the word simulator mean as it is used in the sentence?
a method used for tracking
a machine used for imitation
a device used for encouragement
o a tool used for long-distance transportation

a machine used for imitation

Explanation:

To simulate is similar to imitate. In the passage, the machine allows the turtles to move their legs as if they were swimming. It copies the conditions turtles need to swim.  

Simulators can be mechanical, as in the example, but there are also virtual simulators which are used in all kind of experiments, training, and leisure. Think of videogames or flight simulators.  

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