By the beginning of October of 1950, UN forces had pushed the North Koreans back to the Yalu River. Option three is correct.
By September 1950, UN forces led by the American General MacArthur landed in Inchon and immediately pushed the North Koreans back over the 38th parallel. Later on, by October 1950 they had rolled back the communists to the Yalu River on the border with China.
The Spanish largely enslaved the native populations and made them act as labor for their new efforts in the Americas.
In order to write a good paragraph he must contain details and facts that are an integral part of the essay. That is why it is essential to analyze, because this achieves focus and attention to details that are important. In this way, the basic idea or topic of the paragraph is thoroughly elaborated, argued by the facts, that the given topic would be clear to the reader or the potential buyer. By doing so, the analysis contributes to clarifying all aspects, ideas, attitudes, opinions, to whom they are addressed, which tones dominate, and so on. Paragraphs may relate to the analysis of the literary work, but also, for example to the tourist offer and the like. In any case, a clearly presented idea must be visible, which is achieved by precise analysis through details and facts.
