Given the question: Read the following article and select the best answer. Article: Sheela spent three days memorizing a poem for an oral test, but her friend Nisha merely scanned a new poem twice before reciting it from memory! Why then was there a difference? Nisha just knew how to learn better than Sheela. She had increased the ability of her brain by using some skills. Here are some steps to better learning. Preview the matter first: That is, _ l. You can understand more if you first scan it or skim over it quickly. Read the first sentence of each paragraph, and glance at the table of contents and the preface. Slow down and read it aloud to yourself: Speed reading is fine for easy material but for more complex works, slower reading is much more effective. Good learners vocalize , either loudly or in their minds, listening to each word as they read. They also actively think about what they read and take in it. Organize facts into categories: For instance, if you have to memorize a _ list containing names of animals, types of transport, items of clothing and kinds of jobs, it is easier if you divide them into groups or categories. Dividing it into smaller, meaningful parts makes it easier to learn. Be focused: To improve concentration and focus, fix a particular time and place for studying. Use a variety of methods, like writing down what you've read or taping it and then listening to it, or making an outline. Follow your own learning style: Each person has his own way of learning. lf given the pieces of an object to assemble , each of us uses a different method to arrive at the same result. Analyze your approach and follow the method that you feel most comfortable with. Question: The example of Sheela and Nisha is used to _ . - show the difference between people in learning ability - explain the difficulty in memorizing poems - teach people how to memorize a poem quickly - introduce the main topic -- learning skills
The answer is:
introduce the main topic -- learning skills