Answer and Explanation:
This question is about the article "China goes back to school"
1. when the author uses the word "harnessed" he wants to itemize the existence of Chinese government control in the population. This is because this word refers to the control that a farmer has over the pack animals, after pulling the carts over to do the work that the farmer thinks is necessary.
2. The choice of this word is more effective than the word "used" because it refers to the meaning of constant manipulation, which "used" does not prove.