单选题 Culture determines what kind of thinking is important and what kind is devalued. Learners use the language, tools, and practices of their culture to learn concepts Although students have individual learning styles, these learning styles are often combined with cultural values. For example, Navajo children often learn first by observing and listening. Then, when ready, they continue learning on their own in cooperation with and under the supervision of an adult. In this way, the children learn all the skills they need. Navajo children speak very little during this process. In contrast, many African-American children learn effectively by acting and performing. They like classroom activities such as oral presentations. Roleplays, and dramatic performances. Lots of talking is useful for these students. Another way of learning is through reading and writing. Asian students generally need writing to support their learning, and therefore do well in classes where there is lots of reading and writing. It is common to see Japanese students trace the spelling of words they have heard. They are more comfortable seeing new material than hearing it. Koreans are believed to be the most visual learners. So although learning styles significantly determine how a person takes in new material, one's culture also influences how he learns. What is the main idea of the passage?