<span>If these were the missing choices:
A. The first train consisted of thirty-four cars weighing, all told, ninety tons.
B. Before the time of Watt, the steam engine was exclusively a steam pump—slow and wasteful of fuel.
C. The idea of using steam for driving stationary machinery originated in the early centuries.
D. Watt made it a quick, powerful, and efficient engine, requiring only a fourth as much fuel as before.
My answer is D. WATT MADE IT A QUICK, POWERFUL, AND EFFICIENT ENGINE, REQUIRING ONLY A FOURTH AS MUCH FUEL AS BEFORE.
Though the passage is not given, I chose option D because it gives the benefit that others experienced from Watt's contribution.</span>
The two main ideas behind the Behaviorist theory from Lightbown & Spada's is imitation and practice.
<h3>What is Behaviorist theory?</h3>
Behaviorist theory states that every person behavior is the influence of its environment. It also says that the behavior is influenced very much by the surrounding environment, and very less influence of the inherited behavior.
Thus, the two main ideas behind the Behaviorist theory from Lightbown & Spada's is imitation and practice.
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