Answer:
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.
Labor's work hours were limited.
Answer:
the bartering of goods for each other
The Crisis of the third Century was a period of extreme upheaval for the Roman Empire.
I’m very sure it has to be A.
Explanation:
B is a common event that happened to most slave families during the slave era
And C the slave owners wouldn’t do. Why? Because they preferred more cruel and unusual punishments in that time.
Hope this helped!