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.
People began to rely on agriculture. And, organizing agriculture led to the development of political organization. Women's role in society became more domestic as men began to do the farmwork. When there was surplus agricultural production, other occupations like artisans and merchants came up.
The Berlin Blockade (1948–49) was the first major crisis of the Cold War. With the victory of the Communist side in the Chinese Civil War and the outbreak of the Korean War (1950–53), the conflict expanded.
The new order, was formed to build up Japanese authority throughout the coninent.